2019届一轮复习人教版选修七Unit2Robots单元教案（23页word版） 24页

‎2019届一轮复习人教版选修七Unit 2Robots单元教案 指导思想与理论依据　　　‎ ‎1．指导思想 本课题努力结合新课程的理念，将课堂教学放在具体的语言情景之中；努力培养学生的综合语言运用能力，并且把听、说、读、写语言技能的训练综合运用于课堂教学之中。通过探究法、观察法和发现法，让学生发挥主观能动性，利用两两合作、小组活动的方式，激发学生参与教学的热情，让学生整堂课都处于新鲜感不断的亢奋状态中。根据学生的认知能力和接受程度，设计了写作等任务，使语言得到输出，可以使学生产生继续学习的动力。‎ 总之，本次设计的宗旨是努力提高课堂教学的实效性，使学生能够提高语言的实际运用能力，达到最终教学的目的。‎ ‎2．理论依据 ‎《普通高中英语课程标准》明确提出：“要通过设计丰富多彩的课内外学习活动，使学生在参与交际活动的过程中形成交际策略。” ‎ 教材内容分析　　　‎ 本单元以机器人和科幻小说为话题，介绍了20世纪世界知名的科幻小说家Isaac Asimov发表于1951年的Satisfaction Guaranteed 和他的生平。通过本单元的教学，旨在让学生了解科幻小说最大的特征在于：它赋予了“幻想”依靠科技在未来得以实现的极大可能，甚至有些“科学幻想”在多年以后，的确在科学上成了现实。如Isaac Asimov 1951年描述的机器人的部分功能已经被应用于现实生活和工作中。在教学中，要鼓励学生敢于幻想，大胆创新，发挥自己丰富的想象力和创作力，写出独具特色的科幻文章。‎ 教学内容如下：‎ Warming Up介绍了机器人的制造、种类、功能等等，再让学生分组列表，把自己熟悉的科幻文艺形式(科幻故事、电影、电脑游戏、电视剧、卡通等等)写出来，并进行简单地交流。‎ Pre－reading 通过讨论机器人是否像人类一样有自己的思维、是否有感情引出Isaac Asimov的科幻小说Satisfaction Guaranteed，为本单元的Reading做好了铺垫。‎ Reading的课文是Isaac Asimov发表于1951年的科幻小说Satisfaction Guaranteed。文中描述的机器人Tony是一个除去面无表情外，身材高大、相貌英俊、聪明机智的完美男人，仅三周的时间就使女主人坠入爱河。‎ Comprehending共有3个练习，练习1是关于克莱尔的情感变化，练习2是关于课文内容的5个问答题，旨在考查学生对课文的理解；练习3要求学生比较机器人Tony在physical，mental两方面与人的异同，与Pre－reading 部分的问题相呼应。‎ Learning about Language分为两部分，Discovering useful words and expressions是本单元词汇练习题；Revising useful structures是本单元语法练习题，通过本单元的学习，要求学生熟练掌握不定式的被动语态。‎ Using Language分为两部分，Listening and speaking是Molly 和Kate 讨论Satisfaction Guaranteed的对话录音，要求学生根据对话内容学会运用表达自己观点的常用句型。这部分教学内容还要求学生以机器人为话题，充分发挥自己的想象力，谈论机器人做家务的利与弊。并且要求自己动手设计机器人，附上文字说明。Reading，discussing and writing部分的内容是科幻小说家Isaac Asimov的生平介绍。文章后附有练习题。练习1要求学生根据时间线索了解在作者生命中发生的重要事件；练习2、3要求学生讨论Isaac Asimov的“机器人三定律”；练习4要求学生借助文章信息和练习1的表格笔头简述阿西莫夫的生平事迹。‎ 教材重组　　　‎ Period 1 Warming Up，Pre－reading，Reading and Comprehending Period 2 Language Study ‎ Period 3 Grammar Period 4 Listening，Speaking and Writing Period 5 Using Language Period 6 Listening and Reading Task Period 7 Speaking，Listening and Writing Task 三维目标　　　‎ 知识目标 ‎1．掌握本单元教学目的和要求中的单词和词汇。如：fiction，desire，satisfaction，alarm，alarmed，sympathy，elegant，pile，scan，fingernail，absurd，haircut，accompany，counter，cushion，awful，affair，declare，envy，test out，ring up，turn around，leave...alone etc。‎ ‎2．帮助学生更多地了解机器人以及有关的科幻小说、小说家阿西莫夫及其文学作品。‎ ‎3．复习被动语态和学习动词不定式的被动形式。‎ 能力目标 学会使用推测和确信的表达法。‎ 情感目标 培养学生的想象力和对未知世界的探索精神。‎ 教学重点　　　‎ ‎1．更多地了解机器人以及科幻小说。‎ ‎2．掌握女主人公克莱尔的感情和心理上的变化。‎ 教学难点　　　‎ ‎1．巩固动词不定式的被动式的用法。‎ ‎2．学会使用推测和确信的表达法。‎ 教学方法　　　‎ ‎1．任务型教学。‎ ‎2．合作型教学。Period 1　Warming Up，Pre－reading，‎ Reading and Comprehending Teaching goals　　　‎ ‎1．Be able to learn some important words and phrases.‎ fiction，desire，satisfaction，alarm，alarmed，sympathy，elegant，pile，scan，fingernail，absurd，haircut，accompany，cushion，awful，affair，declare，envy，test out，ring up，turn around，leave...alone etc.‎ ‎2．Help students to learn about robots and science fiction.‎ ‎3．Enable students to realize science fiction reflects scientific thought；fiction of things－to－come based on things－on－hand.‎ Teaching important points　　　‎ ‎1．Enable students to grasp what Tony did to help Claire and how her feelings towards Tony changed during Tony's stay at her house.‎ ‎2．Help students to sum up characteristics of science fiction.‎ Teaching difficult points　　　‎ How Claire's feelings towards Tony changed during Tony's stay at her house.‎ Teaching methods　　　‎ Discussing，explaining，reading and practicing Teaching aids　　　‎ The multimedia computer ‎ Teaching procedures　　　‎ Step 1　Warming up ‎1．Present photos of different kinds of robots.Then ask the students to say something about their favorite robots.‎ ‎2．Ask students to discuss the following questions in pairs.‎ ‎(1)What is a robot?‎ ‎(2)What can a robot do?‎ Suggested answers：‎ ‎(1)A robot is a machine designed to do jobs that are usually performed by humans.Robots are programmed and controlled by a computer.‎ ‎(2)A robot can do many things.For example，it can play music，sing songs and dance to music；it can pour tea，sweep the floor and cook dinner；it can play football；it can explore dangerous places；it can play with children；it can serve us etc.‎ Step 2　Pre－reading Look at the photos of robots and ask students to discuss the questions in Pre－reading in groups.Students are encouraged to speak out their opinions freely.‎ ‎1．Where would you find each robot？What does each one do?‎ ‎2．Can you think of any other type of robot?‎ ‎3．Do you think it is possible for a robot to think for itself，have feelings，have its own needs and desires，or look and feel like a human being?‎ Step 3　Skimming ‎1．Skim the text to find out t he main characters in the story.‎ Title Characters in the story Satisfaction Guaranteed employed in a company that made robots Larry's wife，a housewife a robot a woman that Claire envied ‎　　Keys：‎ Title Characters in the story Satisfaction Guaranteed Larry Belmont employed in a company that made robots Claire Larry's wife，a housewife[来源:学科网ZXXK]‎ Tony a robot Gladys Claffern a woman that Claire envied ‎　　2.In groups，find answers to the following questions：‎ ‎(1)What did Tony look like?‎ ‎(2)What was Larry Belmont's problem in the end?‎ Several minutes later check the answers with the whole class.‎ Suggested answers：‎ ‎(1)He was tall and handsome although his facial expressions never changed.His hair was smooth and black and his voice was deep.‎ ‎(2)His wife may have fallen in love with Tony，the robot.‎ Step 4　Scanning ‎1．Ask students to read the text carefully and then find out the true statements.‎ ‎(1)Claire didn't like the idea at the beginning，but she agreed to it at last.‎ ‎(2)When Tony，the robot，offered to help dressing，Claire was pleased to accept it.But she thought it was surprising for a robot to be so human.‎ ‎(3)Tony could understand Claire when she said she was not clever.‎ ‎(4)Claire was sorry she could do little to help her husband，who wanted to improve his social position.‎ ‎(5)Tony was eager to help Claire.He scanned quite a lot of books in the library，but he could find no way out.‎ ‎(6)Tony went to town with Claire to buy things he wanted to improve the house.‎ ‎(7)While Tony worked on the improvements of the house，Claire also did her part.‎ ‎(8)Claire's guests were filled with admiration when they saw her house was completely changed.‎ ‎(9)Claire was very happy to find that Gladys envied her.‎ ‎(10)The company was very pleased with Tony's report because he had successfully made a woman fall in love with him.‎ Keys：True statements：(1)，(3)，(4)，(7)and (9)‎ ‎2．In groups，discuss the questions in Comprehending on Page 12.‎ ‎(1)Why did Tony open the curtains?‎ ‎(2)What did Tony do to prevent Claire from being harmed?‎ ‎(3)Why did Tony have to be rebuilt?‎ ‎(4)How would you feel if you had a robot like Tony in your house?‎ ‎(5)Claire spent three weeks with Tony in her house.Which sentences in the story show that she kept forgetting and then remembering he was a machine?‎ Several minutes later check the answers with the whole class.‎ Suggested answers：‎ ‎(1)He wanted Claire's guests to see him and Claire together so that she could be envied by the women guests.‎ ‎(2)Tony prevented Claire from being harmed by making her feel good about herself.He helped her make her and her home elegant so that she would not feel like a failure.‎ ‎(3)Because the company (designers)felt that they could not have women falling in love with machines.‎ ‎(4)Various answers can be accepted.‎ ‎(5)Sentences：‎ How absurd，she thought.He was just a machine.‎ He held her firmly in his arms and she felt the warmth of his body.She screamed，pushed him away and ran to her room for the rest of the day.‎ Then she remembered—Tony was just a machine.‎ She shouted “Leave me alone” and ran to her bed.‎ ‎3．In groups，list Tony's characteristics that were similar to and those that were different from those of a human being.‎ Characteristics Similar Different Physical Mental ‎[来源:Zxxk.Com]‎ ‎　　Suggested answers：‎ Characteristics Similar Different Physical Looks like a human being.Body and skin soft and warm.Hair and fingernails realistic.Voice like a human's.‎ Facial expressions never change. ‎ Quicker reactions(She fell off a ladder and even though Tony was in the next room，he managed to catch her in time.)‎ Mental Able to make suggestions and predictions.Able to make a plan and follow it through.Has good communication skills.‎ Behaviour not appropriate(Tony brought her breakfast and then asked her whether she needed help dressing.)‎ Step 5　Comprehending ‎1．Tell students that Claire's feelings towards Tony changed as the story developed.Read the story again and then fill in the occasions when Claire had these feelings.‎ Occasion[来源:学|科|网]‎ Claire Occasion[来源:学.科.网Z.X.X.K]‎ Claire disliked him called him a dear was alarmed felt his warmth felt embarrassed felt being envied admired him cried all night ‎　　Suggested answers：‎ Occasion Claire Occasion Claire ‎1.Before he arrived disliked him ‎5.When he helped her with the salesman called him a dear ‎2.When he arrived was alarmed ‎6.When she fell off a ladder and caught by Tony felt his warmth ‎3.When he offered to help her dress felt embarrassed ‎7.When she heard Gladys whispering to another woman that she had never seen anyone so handsome as Tony felt being envied ‎4.When he offered to help her improve her house and herself admired him ‎8.When she remembered Tony was just a machine cried all night ‎　　2.After filling in the occasions when Claire had these feelings，ask students to work together to find out how Claire's emotion developed.‎ Suggested answer：‎ At first refused to have Tony at her house—accepted him—trusted him—proud of him—loved him—sad to remember he was just a machine ‎(T：From her emotion development，we can see Tony was designed as a Mr.Perfect.He is designed not to harm Claire or allow her to be harmed.This is one of Isaac's three laws for robots.Later in this unit we will learn more about his three laws.)‎ Step 6　Discussion In groups，discuss the following questions.(Students are encouraged to speak out their opinions freely.)‎ What suggestions do you want to give to Larry Belmont as an engineer?‎ What suggestions do you want to give to Larry Belmont as a husband?‎ Step 7　Homework ‎ Period2‎ ‎1．Learn the useful words and phrases in this unit by heart.‎ ‎2．Remember the characteristics of science fiction.‎ ‎3．Surf the Internet to learn more about robots and science fiction.‎ 教学重点　　　‎ 掌握课文中一些重要的词组和句型的用法，并能够正确使用。‎ 教学难点　　　‎ 正确使用重要的词组和句型 教学方法　　　‎ 自主学习，合作学习，教师讲解[来源:学科网]‎ Step 1　Revision ‎1．Ask students to retell the story，using their own words.‎ ‎2．Show the pictures of the robots which the students design and tell the whole class what the robots can do.‎ ‎[设计说明]要求学生自己设计机器人是上节阅读课的家庭作业，可以在课堂上安排一定的时间进行展示和英语说明，也可以让学生自由组队，把自己设计的机器人画出来，并且对于机器人的功用加上文字说明，然后张贴在教室的学习园地中，进行评比。‎ Step 2　Language points Go through the important phrases and sentences.‎ ‎(1)test out 试验　test sth.on sb./sth.在某人/某物身上做试验 ‎(2)His name was Tony and he seemed more like a human than a machine.‎ more...than...与其说……不如说……‎ ‎(3)It was disturbing and frightening that he looked so human.‎ 常用句型：It be＋adj.＋that...‎ It be＋n.＋that...‎ It be＋done＋that...[来源:Z。xx。k.Com]‎ ‎(4)accompany sb.to someplace e．g.The robots are not allowed to accompany the owners to the supermarket.‎ accompany sb.in doing e．g.Will you please accompany me in travelling to Shanghai on business?‎ ‎(5)ring sb.up ‎ ring off ‎(6)turn around 补充常用短语：turn up　turn down　turn on　turn off　turn over ‎(7)The clock struck eight.“strike”有“罢工、袭击、划火柴”等多种意思，在此处指“敲钟”‎ ‎(8)leave sb.alone＝let sb.alone(let alone更不用说) ‎ Step 3　Practice Exercise 1　Translate the following expressions into English.‎ ‎1．试验　　　　　　　2.陪伴某人去某处 ‎3．陪伴某人做某事　 4.让某人单独待着 ‎5．与其说……不如说……　 6.打电话给某人 ‎7．挂断电话　 8.转过身[来源:学|科|网]‎ ‎9．同情某人　 10.一大堆书[来源:学,科,网Z,X,X,K]‎ ‎11．更确切地说　 12.和某人有暧昧关系 ‎13．从视线中消失　 14.对某人耳语 ‎15．阻止某人做某事 Suggested answers：‎ ‎1．test out　2.accompany sb.to someplace　3.accompany sb.in doing　4.leave ‎ sb.alone　5.more...than...　6.ring sb.up　7.ring off　8.turn around　9.have/feel sympathy for sb.　10.a pile of books　11.or rather　12.have an affair with sb.　13.disappear from sight　14.whisper to sb.　15.prevent sb.from doing sth.‎ Exercise 2　Translate the following sentences into English.‎ ‎1．我必须请你陪我去警察局。‎ ‎2．为了提高他的社会地位，这个年轻人拼命工作。‎ ‎3．与其说他勇敢，不如说他愚蠢。‎ ‎4．一转身，女孩就看见了她的母亲正在朝她挥手。‎ ‎5．我一到北京，就给你打电话。‎ ‎6．听到那个坏消息后，他希望一个人待一会儿。‎ Suggested answers：‎ ‎1．I must ask you to accompany me to the police station.‎ ‎2．To improve his social position，the young man worked very hard.‎ ‎3．He is more stupid than brave.‎ ‎4．Turning around，the girl saw her mother waving at her.‎ ‎5．I will ring you up as soon as I arrive in Beijing.‎ ‎6．After hearing the bad news，he wanted to be left alone for a while.‎ ‎[设计说明] 这两个练习目的在于让学生熟悉课文中的重要词组并且能够灵活运用。‎ Step 4　Learning about language Exercise 1　Rewrite these sentences using words or phrases of similar meaning from the text to replace the underlined parts.‎ ‎1．Bill felt great pleasure when he tried his new fax machine and it worked.‎ ‎2．He felt pity for Claire because she was overweight and needed to lose about five kilos to look slim.‎ ‎3．Even though Jane told him many times to go_away her brother still accompanied her to the doctor.‎ ‎4．Her greatest wish was to look as elegant as Gladys Claffern.‎ ‎5．Please call me before you buy a new digital camera so I can go with you.‎ ‎6．She looked_at the computer screen carefully hoping to find some new emails in her mailbox.‎ ‎7．It was ridiculous that his own mother would not talk to him about the affair.‎ ‎8．He felt happy when his boss stated that he could set aside some time for exercise.‎ Keys：1.satisfaction，tested out　2.sympathy　3.leave...alone　4.desire　5.ring...up　6.scanned　7.absurd　8.declared Exercise 2　Complete the following paragraph using the words and phrase in their proper forms.‎ ‎(News,16/04/2321) Historical research shows that in the 22nd century many people told stories about how，at one time，people could buy robots as house decorators.The robots would ______ the literature for the latest ideas in home decoration.Often the robots would ______ designs that were grander than their owners wanted.Brightly coloured ______ and ______ would be suggested together with brightly patterned walls and carpets.Some of the ______ in the shops thought that the designs were ______.While some owners were firm with their robot's ‎ suggestions，others would ______ and walk out of the shop，feeling embarrassed.A few other robots would even get into physical fights with their owners in public as their electrical systems sometimes would set off the shops' ______.After a while the government decided such behaviour was not appropriate and passed a law______ robots should not leave the house.So robots became household cleaners or industrial workers instead!‎ Keys：scan，favour，cushions/beddings，beddings/cushions，clerks，awful，turn around，alarms，declaring Exercise 3　Work out phrasal verbs using the words below.Then make more phrasal verbs and work out their definitions.‎ 　 ‎1．to start an engine(turn ______)‎ ‎2．to call somebody by telephone (ring______)‎ ‎3．to not include(leave ______)‎ ‎4．to refuse an offer or a job (turn ______)‎ ‎5．to face in another direction (turn ______)‎ ‎6．to stop speaking to someone by telephone (ring ______)‎ ‎7．to stop annoying or upsetting someone (leave...______)[来源:Z。xx。k.Com]‎ ‎8．to become somebody or something else(turn ______)‎ ‎9．to find out whether an idea or a plan is correct ot not (test______)‎ Keys：1.on　2.up　3.out　4.down　5.around　6.off　7.alone　8.into　9.out ‎[设计说明]这三个练习都是教材中有的，练习1要求找出与画线部分意思相似的单词或短语，练习2的难度较大，一方面是学生对于2321年可能发生的事情并没有概念，另一方面是由于这套教材每个单元的生词都比较多，学生对于段落上面供选择的单词的意思不熟悉。练习3的重点仍然是重要的词组，同时复习一些以前学过的词组。‎ Step 5　Test Give the students ten minutes to finish a mini－test.(The teacher can choose some exercises in the Workbook.)‎ ‎[设计说明]这一部分主要是考查学生对于所学内容的掌握程度，如果学生能力较差，可以给出5～10分钟的复习时间。教师可以从课后练习中选择一些，也可以要求学生在复习时编写题目给同桌做。如果时间不够，可以把测验的题目作为家庭作业，回去完成。‎ Homework：‎ ‎1．Revise the important phrases and drills in the passage.‎ ‎2．Finish the test.‎ Period3‎ Teaching aims　　　 ‎ ‎1．Revise the passive voice(including the infinitive) and know the exact meaning of the structure.‎ ‎2．Be able to use the useful words，expressions and structures correctly.‎ Teaching procedures　　　‎ Step 1　Revision Ask students to answer the following questions without referring to the textbook.‎ ‎1．What was going to be tested out by Larry's wife，Claire?‎ ‎2．How did Larry Belmont finally persuade his wife to accept the experiment?‎ ‎3．How did Claire feel when she was offered sympathy by a robot?‎ ‎4．What did Tony expect to do about the house before he was to leave and Larry was to return?‎ ‎5．How did Claire feel when she was envied by those women?‎ ‎6．What happened to Tony at last?‎ Suggested answers：‎ ‎1．The robot was going to be tested out by Larry's wife，Claire.‎ ‎2．Larry persuaded her that the robot wouldn't harm her or allow her to be harmed. ‎ ‎3．She thought it was ridiculous to be offered sympathy by a robot.‎ ‎4．Tony expected the house to be completely transformed.‎ ‎5．She felt it a sweet victory to be envied by those women.‎ ‎6．Tony had to be rebuilt.‎ Step 2　Grammar learning ‎1．不定式的被动形式 当不定式与逻辑主语之间是被动关系时，即不定式的逻辑主语是不定式所表示动作的承受者，不定式一般要用被动形式。其被动式可以分为两种：一般式和完成式。‎ ‎(1)一般式：to be done，表示不定式动作在谓语动词之后或者同时发生。‎ It is a great honor_to_be_invited_to speak here.‎ 很荣幸被邀请在这里讲话。‎ The novel is said_to_be_published_next month.‎ 据说这本小说下月要出版。‎ ‎(2)完成式：to have been done，表示不定式动作发生在谓语动词之前。‎ The book is said to_have_been_translated_into six languages.‎ 这本书据说已经被翻译成六种语言。‎ The boss preferred_to_have_been_given_more work to do.‎ 老板宁愿被分给更多的工作做。‎ 被动 一般式 to be done 完成式 to have been done ‎　　2.不定式被动形式的作用 ‎(1)作主语 It's an honor to_be_invited to the ceremony.‎ 很荣幸被邀请赴宴。‎ It's a pity to_be_kept in the house in such fine weather.‎ 在这样好的天气被关在家里真是遗憾。‎ ‎(2)作表语 The letter is_to_be_sent_by airmail.‎ 这封信笺要空邮。‎ ‎(3)作宾语 She didn't like to_be_treated as a child.‎ 她不喜欢被当成孩子。‎ The boy asked to_be_given an opportunity to try again.‎ 那男孩要求给他再试一次的机会。‎ ‎(4)作宾语补足语 I'd like my bedroom to_be_cleaned.‎ 我想整理一下我的卧室。 ‎ ‎(5)作定语 He was the last one_to_be_asked to speak at the meeting.‎ 他是最后一个在会上被邀请发言的人。‎ ‎(6)作状语 His mother left the small village，never_to_be_seen again.‎ 他母亲离开了那个小山村，再也没有人见过她。‎ ‎3．不定式有些要注意的地方 ‎(1)感官动词和一些使役动词的不定式的主动形式要省去to，但在变成被动语态后需要加上to，能这样用的动词或动词词组有：make，have，let，see，hear，notice，listen to，watch等。如：‎ We often see him act like that.＝He is often seen to act like that.‎ 我们常常看到他那样做。‎ ‎(2)在can't help but，have nothing to do but结构中，介词but后的不定式省去to。如：‎ I can't_help_but suspect his motive.‎ 我不禁怀疑起他的动机。‎ I have_nothing_to_do_but_watch TV.‎ 我没什么事情可做，除了看电视。‎ ‎(3)不定式有时要用主动形式表示被动意义 ‎①形容词以及含有形容词的名词后的不定式，一般用主动形式表示被动意义，其中形容词常见的有easy，difficult，important，impossible等。如：‎ The work is impossible_to_finish in two days.‎ 工作不可能两天之内完成。 ‎ English is not so easy_to_learn.‎ 英语并不好学。‎ ‎②一些固定用法，如“挨骂，受责备，受批评” 用be to blame；“(东西等)出租”用to let。‎ He is to blame for what he has done.‎ 他应为他所做的受责备。‎ The house is to let.房子要出租。‎ Step 3　Exercises ‎1．The crowd cheered wildly at the sight of Liu Xiang，who was reported ______ the world record in the 110－meter hurdle race.‎ A．breaking　　　 B．having broken　　　‎ C．to have broken　　　 D．to break ‎2．I like getting up very early in summer.The morning air is so good ______.‎ A．to be breathed　 　 B．to breathe ‎ C．breathing　 D．being breathed ‎3．______ the project as planned，we'll have to work two more hours a day.‎ A．Completing　 B．Complete ‎ C．Completed　 D．To complete ‎4．Having a trip abroad is certainly good for the old couple，but it remains______ whether they will enjoy it.‎ A．to see　 B．to be seen ‎ C．seeing　 D．seen ‎5．I hurried to the meeting hall，only______ that the meeting had been put off.‎ A．to tell　 B．to be told ‎ C．telling　 D．told ‎6．Do let your mother know all the truth；she appears______ everything.‎ A．to tell　 B．to be told ‎ C．to be telling　 D．to have been told ‎7．Little Tom should love______ to the theater this evening.‎ A．to be taken　 B．to take ‎ C．being taken　 D．taking ‎8．It is said that plastics can be used to______ many things.Now people are used to______ plastics products.‎ A．make；using B．making；using ‎ C．making；use D．make；use ‎9．With a lot of problems______，the newly－elected president is having a hard time.‎ A．settled　 B．settling C．to settle　 D．being settled Keys：1～5 CBDBB　6～9 DAAC ‎ Step 4　Drilling Ask students to do Exercise 1 on Page 14 and then check the answers together.‎ Keys：‎ Exercise 1‎ be tested out，be harmed，be offered，was amazed，was not allowed，be discovered，be completely transformed，were impressed，be envied，be rebuilt Ask students to do Exercise 2 and then check the answers together.‎ Keys：‎ Exercise 2‎ ‎1．to be designed　2.to be rebuilt　3.to be accompanied　4.to be known as　5.to be filled with　6.to be tested out　7.to be envied　8.to be set aside Step 5　Using the passive infinitive Translate the following sentences into English using the passive infinitive.‎ ‎1．那本关于《圣经》的书需要在这个周末之前还给图书馆。‎ ‎2．下周末前，这个旧扶手椅将由一个沙发代替。‎ ‎3．不要着急，你有足够的时间把那个传真发到你的公司。‎ ‎4．你同妻子离婚的决定必须要得到她的同意。‎ ‎5．刚刚出了一起事故，不过没有必要惊慌，没有人受伤。‎ ‎6．虽然她考得不错，但是她预料父母还是会对考试的结果感到失望。‎ ‎7．当在医院进行大手术的时候，她得到了家人的关爱和支持，为此她感到非常高兴。‎ ‎8．他为自己被宣布成为智力竞赛冠军得主的事感到十分兴奋。‎ ‎9．他把他们已经得到的2000元与将提供的1500元加在一起，总共3500元。‎ ‎10．没有主力队员的参与，他们一定会在即将到来的比赛中被打败。 ‎ Suggested answers：‎ ‎1．That book on the Holy Bible needs to be returned to the library by/before the end of the week.‎ ‎2．That old armchair is to be replaced by a sofa next week.‎ ‎3．Don't worry—you still have plenty of time for that fax to be sent to your company.‎ ‎4．Your decision to divorce your wife has to be made with her agreement.‎ ‎5．There has been an accident but there is no need to be alarmed.Nobody has been hurt.‎ ‎6．Although she had done well，she expected her parents to be disappointed by her exam results.‎ ‎7．She was happy to be supported by the affection of her family when she had a serious operation in hospital.‎ ‎8．He was so excited to be declared the winner of the talent competition.‎ ‎9．He added the 2000 yuan they had received to the 1500 yuan to be offered，making 3500 yuan in all.‎ ‎10．Without their key/leading player，they're bound to be beaten in the coming competition.‎ Step 6　Homework Finish off Exercises 1 and 2 on Page 56.‎ Period4‎ 设计思想　　　‎ 笔者将高二英语选修7 Unit 2 Student's Book中的Using Language部分的Listening and speaking与Workbook中的Listening Task、Writing Task部分内容经整合设计成一节以听带说、发展写作的语言运用课，旨在从听说写多方面培养学生的语言运用能力。根据《普通高中英语课程标准》对高中学生听说读写各种能力的要求，笔者从学生的学习兴趣和认知水平出发，倡导新课程理念下的自主学习与合作学习，鼓励和引导学生进行自主探究，培养学生的想象力和对未来世界的探索精神，在自主探索和合作交流的过程中真正理解和掌握基本的英语知识与技能，从而培养综合的语言运用能力。‎ 教材分析　　　‎ 本单元的话题是“机器人”、“科幻文学作品”和“科幻小说作家”。在第一课时的Reading中，学生们在讨论了机器人的制造、种类、功能等的基础上，阅读了一篇科幻小说，讲述某公司试验机器人Tony的故事，Tony是如此之好竟然让女主人对他产生了感情！在读了这样一个亦真亦幻的故事之后，笔者安排这一课时的内容为与课文内容相关的听说练习(Using Language中的Listening and speaking)，先听两位女士读完科幻小说故事之后的对话并运用想象力展开小组讨论，再将Workbook中的Listening Task与Writing Task整合为一个Writing Task，由听带说到写，利用已有认知并发挥自己的想象力，创造性地完成写作活动。‎ 学情分析　　　‎ 本课堂设计教学对象为高中二年级学生，他们思维活跃，智力发展趋于成熟，认知能力比初进高中阶段有了进一步的发展，能较顺利地听取英语信息、处理信息、分析问题和解决问题；学生已储备了相当的词汇和英语知识，能较好地展开话题讨论，各抒己见，书面表达能力也逐步提高；他们有自己的学习技能和策略，学习欲望和能动性加强，主动参与到活动中去，成为课堂的主体，同时也加强了与他人交流合作的能力；同时，高二学生朝气蓬勃，想象力丰富，从而能保证“讨论”这一环节的顺利进行，为下一环节的“写”做好必要的铺垫。根据这些特点，教师可以采用与新课标要求相一致的新的教学方式，即活动式教学法，面向全体学生调动全班学生的积极性，在合作学习的模式下实现教学任务和目标。 ‎ 教学目标　　　‎ ‎1．语言知识目标：引导学生通过听对话掌握有关“supposition and belief”的表达法。‎ ‎2．语言技能目标：训练学生听对话获取信息；训练学生运用所习得语言进行讨论；训练学生在讨论的基础上尝试写作，并学会对他人所写文章进行正确评价。‎ ‎3．学习策略目标：培养学生自主探究、合作学习的能力。‎ ‎4．情感态度目标：通过读听科幻小说，激发学生对科学的兴趣；通过想象，培养学生对未来世界的探索精神。‎ 重点难点　　　‎ ‎1．通过听力练习让学生习得有关“supposition and belief”的表达法。‎ ‎2．培养学生运用想象力探索未来世界的能力。‎ ‎3．培养学生的自主学习策略和合作学习能力。‎ 教学策略与手段　　　‎ 笔者在课前做好充分的准备工作，对教学内容进行优化组合、有效拓展，充分利用“任务型”教学策略，在每一个教学环节给予学生明确的任务。在教学过程中，教师的基本任务是“导”，即起组织和引导的作用，启发诱导学生积极主动地参与教学活动，引导学生逐步从听到写，获取信息、拓展信息并进行加工直到输出信息，培养其开拓精神和创新意识。笔者在教学中指导学生运用合作学习策略进行自主探究，培养其分析问题和解决问题的能力。遵循认知规律，教学环节的安排由浅入深、由近及远、由表及里、由简单到复杂，逐步发展和提高；重视激发学生的学习热情，让学生在创造性的学习活动中获得愉悦的心理体验，变课堂为一个互动的、开放的课堂。‎ Step 1　Pre－listening Task 1：Retell the story Ask several students to retell the story “Satisfaction Guaranteed”．‎ Task 2：Talk about the story[来源:学+科+网]‎ Get the class to talk about the story according to the following questions.‎ Q：Do you think Claire loves Tony？Does Tony really love Claire？Would you like to have such a robot at your house?‎ Step 2　Listening T：Your views sound reasonable and interesting.Now let's listen to Molly and Kate's dialogue to see what are their opinions.‎ Task 1：First listening[来源:学科网]‎ First read the questions in Exercise 1 and then listen to their conversation.Tick the correct boxes.Emphasize that they are listening for particular pieces of information.[来源:Zxxk.Com]‎ ‎1．Who really likes the story？(Molly)‎ ‎2．Who thinks that Claire loved Tony？(Kate)‎ ‎3．Who thinks that Tony loved Claire？(Molly)‎ ‎4．Who thinks that the purpose of Tony's actions was to make Claire feel good about herself？(Kate)‎ ‎5．Who thinks taking Tony away must have hurt Claire？(Molly)‎ ‎6．Who said that making a robot so much like a man was bound to cause trouble？(Kate)‎ Task 2：Second listening Students read the questions in Exercise 2 carefully and then listen to the dialogue again to answer the questions below：‎ ‎1．What does Kate think the difference between robots and humans is?‎ ‎2．How does Kate think Claire was hurting herself?‎ ‎3．Why would one of the girls like a robot such as Tony living at her house?‎ ‎4．What does kate think the company's biggest mistake was?‎ Task 3：Third listening Before listening to the tape again，explain to the students what the expressions of supposition and belief are.Then let them listen again and try to write down the expressions they get from the material.After listening，they may discuss with their partners before reporting to the class.‎ ‎1．Yes，maybe Clair fell in love with him，...‎ ‎2．I_don't_think/believe robots can feel emotion of any kind.‎ ‎3．I_think/suppose/guess/believe Tony loved Clair.‎ ‎4．So_it_must_have_hurt her when he was taken away.‎ ‎5．I_suppose that was the company's greatest mistake.‎ ‎6．I_suppose/guess that's why the company had to rebuild him.‎ Step 3　Speaking Task 1：Imagining and discussing[来源:学|科|网Z|X|X|K]‎ T：Molly likes to have a robot at her house.Would you like one？If you like，what will it be like and what do you want it to do for you?‎ Students may work in groups to imagine and talk about robots they like in the future.Any type is OK.In groups，carry out the following tasks：‎ ‎1．Describe what their imaginary robot looks like.‎ ‎2．Make a list of the purpose of your robot and the abilities your robot have.‎ ‎3．Tell the reasons why you want to have such a robot.‎ Task 2：Reporting Each group should choose a reporter to present their ideas to the whole class.‎ Step 4　Writing Task 1：Pre－writing T：I've heard a lot of amazing ideas and I'm really proud of you！Among you there are some students who want to have a robot as a pet.Do you think it's a good idea？I 've rung up a robot company and they are very interested in the idea.They want you to write down what you think of and perhaps later they can make such a robot.So，come on，talk about a robot pet in pairs！The following had better be included：‎ ‎1．What does your robot pet look like?‎ ‎2．What's the purpose to have a robot pet?‎ ‎3．What do you want the robot to do?‎ ‎4．Why do you want a robot as a pet?‎ Task 2：Writing After discussing a robot pet in pairs，now ask students to write a passage (100－120 words) about it.The contents of the four questions above should be included.‎ Task 3：Post－writing Read their writings to each other，and make an assessment for each other.Choose the best to read to the whole class.‎ Step 5　Homework ‎1．Correct your compositions and write them down on your notebooks.‎ ‎2．Draw your robot pets on large pieces of paper and list their functions.‎ ‎[来源:学.科.网]‎ Period5‎ Teaching goals 教学目标　　　‎ ‎1．Target language目标语言 a．重点词汇和短语[来源:Z*xx*k.Com]‎ explanation，junior，navy，talent，chapter，divorce b．重点句型 It was when Asimov was eleven years old that his talent for writing became obvious.‎ A robot must not injure human beings or allow them to be injured.‎ ‎2．Ability goals 能力目标 ‎ Enable students to get some knowledge about Isaac Asimov.‎ Learn to write a paragraph describing a new type of robot.‎ ‎3．Learning ability goals学能目标 Use their imagination and write a paragraph describing a new type of robot.‎ Teaching important and difficult points教学重、难点　　　‎ Write a paragraph describing a new type of robot.‎ Teaching methods教学方法　　　‎ Listening，discussing，reading and writing.‎ Teaching aids 教具准备　　　‎ Multi－media computer.‎ Teaching procedures & ways 教学过程与方式　　　‎ Step 1　Lead－in：revision T：What is the short story about that we learned in the previous lessons?‎ S1：It is a love story between Claire and Tony，a robot.It seems that the robot has emotions and affections，which makes Claire fall in love with it.In this sense，there is a long way to go to improve the robot.‎ T：Well done！Then do you know who the writer is?‎ S2：Isaac Asimov.‎ T：Thank you.Do you know anything about him?‎ Students' answers may vary.‎ Step 2　First reading T：Now let's read Asimov's biography and learn more about him.‎ Ask the students to glance through the text and find the answers to such questions as：‎ ‎1．Which paragraph tells you when and where Asimov was born and died?‎ ‎2．Which paragraph tells you about his education?‎ ‎3．Which paragraph tells you about the awards he received?‎ Then get them to scan the text for specific information by asking the following questions：‎ ‎1．What subject did Asimov teach?‎ ‎2．When did he start having stories published?‎ ‎3．How many children did he have?‎ Step 3　Second reading T：Now，please read the text in pairs，helping each other with anything that you don't understand.Then try to complete the following timeline：‎ Read about Isaac Asimov and complete the timeline of the events in his life.‎ Date　　　　　Event ‎1920 Born in Russia.‎ ‎1922 ________________.‎ ‎1923 ________________.‎ ‎ Parents bought a candy store.‎ ‎1929 ________________.‎ ‎ Mother had her third child.‎ ‎______ Started to take himself seriously as a writer.‎ ‎1939 ________________‎ ‎ ________________.‎ ‎______ Gained master's degree in chemistry.‎ ‎1942 Finished working in the candy store.‎ ‎ ________________.‎ ‎1942－1945 ________________.‎ ‎______ Got his PhD in chemistry.‎ ‎______ Became a biochemistry teacher，Boston ‎ University School of Medicine.‎ ‎1950 Published his first novel.‎ ‎ ________________.Developed three laws for robots.‎ ‎1951－1953 Published the Foundation trilogy and won an award for it.‎ ‎______ Published his first science book ‎______ Became a full－time writer.‎ ‎1973 Divorced his first wife.‎ ‎ ________________.‎ ‎______ Had a blood transfusion.Became infected with HIV.‎ ‎1992 ________________.‎ Suggested answers：‎ Date Event Date Event ‎1920‎ Born in Russia.‎ ‎1949‎ Became a biochemistry teacher，Boston University ‎ School of Medicine.[来源:Z#xx#k.Com][来源:Z#xx#k.Com][来源:学§科§网Z§X§X§K]‎ ‎1922‎ Sister_born.‎ ‎1923‎ Moved_with_family_to_New_York. ‎ Parents bought a candy store.‎ ‎1929‎ Started_working_in_the_candy_store.‎ Mother had her third child.‎ ‎1950‎ Published his first novel.‎ ‎1931‎ Started to take himself seriously as a writer.‎ ‎1951－1953‎ Published_I，Robot.Developed three laws for robots.‎ ‎1958‎ Began_having_stories_published_in_science_fiction_magazines.‎ ‎1939‎ Published the Foundation trilogy and won an award for it.‎ ‎1941‎ Gained master's degree in chemistry.‎ ‎1953‎ Published his first science book. ‎ Became a full－time writer.‎ ‎1942‎ Finished working in the candy store. Got_married.‎ ‎1973‎ Divorced his first wife. Married_for_a_second_time.‎ ‎1942－1945‎ Worked_as_a_junior_chemist，Philadelphia_Navy_Yard.‎ ‎1983‎ Had a blood transfusion.Became infected with HIV.‎ ‎1948‎ Got his PhD in chemistry.‎ ‎1992‎ Died_in_New_York.‎ Step 4　Group discussion T：By now I'm sure you have a better understanding about Isaac Asimov.In one of his short stories，I，Robot，he developed three laws for robots.The first law was：‎ ‎“A robot must not injure human beings or allow them to be injured.”‎ In groups of four，discuss what the other two laws might be.Write them down on a piece of paper.Then exchange your opinions with other groups.‎ Suggested answers：‎ ‎1．A robot must help human beings do what they wish to do.‎ ‎2．A robot must protect its owner but cannot have him/her fall in love with it.‎ After that，get the students to refer to Asimov's laws for robots on Page 18.‎ Step 5　Listening T：OK，so much for Isaac's biography and his three laws for robots.Let's come back to his short story Satisfaction Guaranteed.How do you like this story?‎ S1：I like the story very much.I wish to have a robot like Tony at my house.‎ T：You are not alone.Someone else wants to have such a Tony too.Now please listen to the tape carefully.‎ Ask students to look through the questions in Exercise 1 before playing the tape.Play the tape again when necessary and then tick the correct boxes.‎ Step 6　Writing T：So it seems that Molly likes the idea of a handsome robot such as Tony to stay at her house and make her happy all the time.And we have every reason to believe that in the future，household robots will be more and more popular.They can help us with our housework or homework，and they can even play with us.Suppose you are an engineer in a company that makes household robots and you have been asked to design a new type of robot.Describe it in a short passage and draw a picture of it if necessary.The following tips may help you：‎ ‎◆Your robot should follow Asimov's three laws.‎ ‎◆You should state the purpose of your robot and the abilities you want your robot to have.‎ ‎◆You'd better make a list of the kinds of body part your robot would need to carry out your instructions.‎ ‎◆Name the different parts if necessary and explain what each part does.‎ While the students are preparing their assignment，encourage them to make full use of their imagination.‎ Step 7　Report/Presentation After the students have finished their work，ask three or four of them to report or present their short passages or pictures.‎ Sample writing：‎ The rubbish collector The rubbish collector is a robot about half the size of a small car.Its body is square and contains a large rubbish bin inside it.It has a camera attached to the top front of its body.Also at the front is a pair of arms.Underneath it has four wheels and six legs.With the camera it can “see” rubbish such as paper，glass，and plastic.If the surface of the ground is smooth，it runs on its wheels，and if the ground is rough，it unfolds its legs and walks.When it sees a piece of rubbish，it stops and uses its arms to pick it up and put it in its rubbish bin.However，when it sees a person，an animal or a plant，it goes around it as it is able to recognize when something is not a piece of rubbish.‎ The company should make this robot as it would be very popular with schools.It would clean the outside ground of the school and so give the students more time to spend on their studies.It would also be a great advantage to have at sports grounds or any other area where rubbish is dropped by the public.‎ Step 8　Homework ‎1．Try to improve the short passage after class.‎ ‎2．Go over the text，and learn all the new words and expressions in the reading passage.‎ Period6‎ Teaching aims　　　‎ ‎1．Learn about robots and robots in the fight against landmines.‎ ‎2．Help students to learn how robots are helping human beings in clearing landmines.‎ Teaching procedures　　　‎ Step 1　Lead－in Present the pictures on Page 54 and ask students to tell what each robot does.(Students are encouraged to speak out their opinions freely.) ‎ Step 2　Listening ‎1．Listen to the interview and number the pictures in the order that you hear about them.‎ Keys：‎ ‎4,2,1,3.‎ ‎2．Listen to the interview again and fill in as much of the table as you can.Share your answers with a partner.Listen once or twice more to check your answers.‎ Robot What is the robot？‎ What can the robot do？‎ ‎1‎ ‎2‎ ‎3‎ ‎4‎ ‎　　Suggested answers：‎ Robot What is the robot？‎ What can the robot do？‎ ‎1‎ Vacuum cleaner It can move from room to room cleaning your house.You can program it so that it cleans when you are away and you can control what it's doing from your computer at the office.‎ ‎2‎ Personal robot called “PaPeRo”‎ It understands 650 phrases，speaks more than 3000 words.It can recognize different people.It can check your email.It can help children do research on the Internet for their homework，talk to them about their day at school and play games.‎ ‎3‎ Tiny helicopter It will be used to fly into dangerous areas.For example，it can fly into a house that's been destroyed by an earthquake and check if anyone's inside.‎ ‎4‎ Walking chair It helps people who can't walk to go up and down stairs.‎ Step 3　Reading task ‎1．As we know，Robots are designed and built to do a task that is dangerous，uncomfortable，or repetitive for humans.Today we are going to read a magazine article about landmines.‎ First，ask students to read this piece of news about landmines.‎ Three decades of war in Cambodia have left scars in many forms throughout the country.Unfortunately，one of the most lasting legacies of the conflicts continues to claim new victims daily.Landmines，laid by the Khmer Rouge，the Heng Samrin and Hun Sen regimes，the Vietnamese，the KPNLF，and the Sihanoukists litter the countryside.In most cases，even the soldiers who planted the mines did not record where they were placed.Now，Cambodia has the one of the highest rates of physical disability of any country in the world.At the current rate of progress，it may take as many as 100 years to clear all the mines in Cambodia，and the UN estimates that with current technology，it will take nearly 1100 years to clear all the mines in the ‎ world.‎ ‎2．Next，present the students some mine signs and remind students that in spite of so many warning signs，there are still many victims as the pictures show.‎ ‎(In spite of so many warning signs，there are still many victims.Look at the following pictures.)‎ ‎3．Ask students to glance through the text quickly and answer the following questions in Exercise 1 on Page 58.‎ ‎(1)What is the main topic of this article？Which part of the text tells you that?‎ ‎(2)Who wrote the article?‎ ‎(3)What do the three pictures show you?‎ ‎(4)Where is research being done on robots that can find landmines?‎ ‎(5)In which two countries might the robots be used?‎ Suggested answers：‎ ‎(1)The main topic is the role of robots in the fight against landmines.The title tells us that.‎ ‎(2)Natasha Wesley.‎ ‎(3)Someone using a metal detector to find landmines；the robot that can find landmines；some people who have lost their legs because of landmines.‎ ‎(4)Chiba University (Japan)．‎ ‎(5)Afghanistan and Cambodia.‎ ‎4．Work in groups to write questions for these answers in Exercise 2.Check your work with your partner.‎ Question Answer ‎1‎ ‎26 000 people.‎ ‎2‎ One person every 20 minutes.‎ ‎3‎ For decades after wars have ended.‎ ‎4‎ ‎100 million.‎ ‎5‎ ‎60 countries.‎ ‎6‎ ‎100 000.‎ ‎7 ‎ ‎2 000 000.‎ ‎8‎ ‎4 m long,1.8 m wide,1 m high.‎ ‎9‎ ‎900 kg.‎ ‎10‎ ‎6.‎ ‎11‎ ‎1997.‎ ‎12‎ ‎122 countries.‎ ‎　　Suggested answers：‎ Question Answer ‎1.How many people are killed or injured by landmines every year？‎ ‎26 000 people.‎ ‎2.How often is someone killed or injured by a landmine？‎ One person every 20 minutes.‎ ‎3.For how long do landmines keep causing damage？‎ For decades after wars have ended.‎ ‎4.How many landmines are buried just beneath the surface of the ground？‎ ‎100 million.‎ ‎5.In how many countries are landmines buried？‎ ‎60 countries.‎ ‎6.How many landmines are removed every year？‎ ‎100 000.‎ ‎7.How many landmines are buried in the ground every year？‎ ‎2 000 000.‎ ‎8.How big is the robot that can find landmines？‎ ‎4 m long,1.8 m wide,1 m high.‎ ‎9.How much does it weigh？‎ ‎900 kg.‎ ‎10.How many legs has it got？‎ ‎6.‎ ‎11.When was an arrangement to stop the manufacture and use of landmines signed？‎ ‎1997.‎ ‎12.How many countries signed the agreement to stop the manufacture and use of landmines？‎ ‎122 countries.‎ ‎　　5.Read the article again carefully and look at each paragraph in turn.Underline the sentence which sets out the main idea of that paragraph.Then fill in the table below.‎ Paragraph Main idea Supporting details ‎1‎ Introduction：the damage landmines cause ‎26 000 people killed or badly injured each year；‎ ‎100 million buried in 60 countries；‎ Most victims are innocent people；‎ ‎2‎ ‎3‎ ‎4‎ ‎5‎ ‎　　Suggested answers：‎ Paragraph Main idea Supporting details ‎1 ‎ Introduction：the damage landmines cause ‎·26 000 people killed or badly injured each year ‎·100 million buried in 60 countries ‎·Most victims are innocent people ‎ ‎2‎ The problem of landmines ‎·Each year 100 000 removed ‎·Each year 2 000 000 buried ‎·Difficult and dangerous to remove ‎3‎ Robots can help find traditional mines ‎·Much safer in the hunt for landmines ‎·Faster at finding landmines ‎·Research at Chiba University ‎4‎ Robots can find plastic mines ‎·Experimental robots in production ‎·To use radar to locate mines ‎·To identify types of mines ‎5‎ World opinions turned against landmines in the 1990s ‎·Agreement in Ottawa，Canada to stop the manufacture and use of landmines ‎·Still a lot of work to be done Step 4　Discussion ‎1．First，ask students to read the following materials.‎ From the text we've learned how serious the situation is.Many lives are put into danger.So we must do something to improve the situation.As we know，the US hasn't yet committed to the Mine Ban Treaty.I hope you will write a letter of suggestion to the president of the US.You may refer to the text ‎2．Encourage students to write a letter of suggestion to the president of the US，for the US hasn't yet committed to the Mine Ban Treaty.In the letter you will suggest the US should stop manufacturing landmines and spend more money on solutions to clearing landmines，for example developing new robots to remove the landmines.‎ You can refer to the following material：‎ Producing one landmine costs $3，yet once in the ground it can cost more than $1000 to find and destroy，according to the ICBL.‎ Over 80 per cent of the 15 000 to 20 000 landmine victims each year are civilians，and at least one in five are children，according to the International Campaign to Ban Landmines (ICBL)．The deadly legacy of landmines far outlasts the conflicts that gave rise to them.Among the most contaminated countries are Iraq，Cambodia，Afghanistan，Colombia，and Angola.　　If time is limited，ask students to finish it after class. ‎ Step 5　Homework Finish writing the letter to the president of the US.‎ A sample：‎ Dear Mr.President，‎ I read in the newspaper that the US hasn't yet committed to the Mine Ban Treaty.I'm writing to suggest your country sign on the agreement.‎ ‎1．Landmines kill or badly injure around 26 000 people every year.There are about 100 million landmines buried just beneath the surface of the ground in 60 countries.Among the most contaminated countries are Iraq，Cambodia，Afghanistan，Colombia，and Angola.I think this is one reason why people in these countries hate the US so much.‎ ‎2．Producing one landmine costs $3，yet once in the ground it can cost more than $1000 to ‎ find and destroy，according to the ICBL.So stop manufacturing landmines and spend more money on finding solutions to clearing the landmines.As you know，your country has designed the most advanced robots.Why not use your advanced technology and spend more money on designing some robots to clear the landmines.If so，it will benefit the whole world.People all over the world will think highly of you and your country.You and your country will become more influential.Japan has set a good example.They have developed robots that can be used to clear landmines.I hope your government will follow Japan's example.‎ Thank you for reading the letter.I hope you will consider my suggestions.I believe you also hope the whole world will enjoy peace.Let's work together and make a peaceful world. ‎ Yours sincerely，‎ Sun Cheng ‎