初中英语完形填空练习（19） 3页

初中英语完形填空练习（19）　　Theworldisnothungry,butitisthirsty.Itseemsstrangethatnearly3/4oftheearthiscoveredwithwaterwhilewesayweareshortof(短缺)water.Why?Becauseabout97%ofwaterontheearthisseawaterwhichwecan’tdrinkoruseforwateringplantsdirectly(直接地).Mancanonlydrinkandusethe3%-thewaterthatcomesfromriversandlakes.Andwecan’tevenuseallofthat,becausesomeofithasbeenpolluted(污染).　　Nowmorewaterisneeded.Theproblemis:Canweavoid(避免)aseriouswatershortagelateron?First,weshouldalllearnhowtosavewater.Secondly,weshouldfindoutthewaystoreuseit.Scientistshavealwaysbeenmakingstudiesinthefield.Today,inmostlargecitieswaterisusedonlyonceandthenrunstotheseaorrivers.Butitcanbeusedagain.Evenif(即使)everylargecityreuseditswater,stilltherewouldnotbeenough.Whatcouldpeopleturntonext?　　Theseaseemstohavethebestanswer.Thereisalotofwaterinthesea.Allthatneedstobedoneistogetthesaltoutoftheseawater.Thisisexpensive,butit’salreadyusedinmanypartsoftheworld.Scientistsaretryingtofindacheaperwayof\ndoingit.Soyousee,ifwecanfindawayout,we’llbeinnodangerofdryingup.　　1.Theworldisthirstybecause________.　　A.3/4oftheearthiscoveredwithwater　　B.wehaveenoughseawatertousedirectly　　C.wehaven’tusedallthewaterinriversandlakes　　D.about97%ofwaterontheearthcan’tbedrunkorusedforwateringplantsdirectly　　2.Whichofthefollowingistrue?　　A.3%ofwaterontheearthisinriversandlakes.　　B.75%ofwaterontheearthisthesea.　　C.97%oftheearthiscoveredwithwater.　　D.3%ofwaterontheearthisseawater.　　3.Fromthepassagewelearn_________.　　A.ifeverycityreusesitswater,we’llbeinnodangerofdryingup　　B.mancanonlydrinkanduseabout25%ofwaterontheearth　　C.todayinmostlargecitieswaterisusedonlyonce　　D.watercanbeusedonlyonce　　4.Toavoidtheseriouswatershortage,whichofthefollowingisthemost\nimportant?　　A.Savewaterandtrytomakegooduseofthewaterinriversandlakes.　　B.Don’tpollutewaterandkeepallriversandlakesclean.　　C.Makedirtywatercleanandthenreuseit.　　D.Trytofindacheaperwaytogetthesaltoutoftheseawater.　　5.Thenameofthepassagewouldbe________　　A.TheSeaWater　　B.HowtoSaveWater　　C.TheThirstyWorld　　D.ThePollutedWater