大学英语四级模拟试题1

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1、大学英语四级模拟试题PartIWriting(30minutes)Directions:Inthispartyouareallowed30minutestowriteanessayentitledTheHeavyBurdenofStudy.Youshouldwriteatleast120wordsaccordingtotheoutlinegivenbelow:1．现在学生的学习负担越来越重2．学习负担越来越重的原因3．应该如何解决这个问题TheHeavyBurdenofStudyPartIIReadingC

2、omprehension(SkimmingandScanning)(15minutes)Directions:Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestions:Forquestions1–7,markY(forYES)ifthestatementagreeswiththeinformationgiveninthepassage;N(forNO)ifthestatementcontradictsthein

3、formationgiveninthepassage;NG(forNOTGIVEN)iftheinformationisnotgiveninthepassage.Forquestions8–10,completethesentenceswiththeinformationgiveninthepassage.TheHydrogenEconomyItseemslikeeverydaythereisanewannouncementinthenewsaboutautomobilespoweredbyfuelcell

4、s.Thepromisesaregreat,sincefuelcellshavethepotentialtoveryquicklydoubletheefficiencyofcarswhilesignificantlyreducingairpollution.Atthesametime,therehavebeennewsstoriesfordecadesabouttheproblemsassociatedwithpetroleum.Everythingfromoilspillstoozone(臭氧)alert

5、stoglobalwarminggetsblamedonourdependenceonfossil(化石)fuels.Thesetwoforcesareleadingtheworldtowardwhatisbroadlyknownasthehydrogeneconomy.Ifthepredictionsaretrue,overthenextseveraldecadeswewillallbegintoseeanamazingshiftawayfromthefossilfueleconomywehavetoda

6、ytowardamuchcleanerhydrogenfuture.ProblemswiththefossilfueleconomyWhilefossilfuelshaveplayedanimportantroleingettingsocietytothepointitisattoday,therearefourbigproblemsthatfossilfuelscreate:Airpollution––Whencarsburngasoline,theinternalcombustionenginealso

7、produces:Carbonmonoxide,apoisonousgasNitrogenoxides,themainsourceofurbansmogUnburnedhydrocarbons,themainsourceofurbanozoneEnvironmentalpollution––Theprocessoftransportingandstoringoilhasabigimpactontheenvironmentwheneversomethinggoeswrong.Anoilspill,pipeli

8、neexplosionorwellfirecancreateahugemess.Globalwarming––Thecarbondioxidecomingoutofeverycar’stailpipeisagreenhousegasthatisslowlyraisingthetemperatureoftheplanet.Theultimateeffectsareunknown,butitisastrongposs