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第PAGE\*MERGEFORMAT35页共NUMPAGES\*MERGEFORMAT35页 2021年12月英语四级全真预测试题及答案 PartⅠWriting(30minutes)Directions:Forthispart,youareallowed30minutestowriteacompositiononthetopicGenerationGap.Youshouldwriteatleast120wordsfollowingtheoutlinegivenbelowinChinese:1.代沟的表现。2.代沟出现的家庭原因。3.代沟出现的社会原因。GenerationGapPartⅡReadingComprehension(SkimmingandScanning)(15minutes)Directions:Inthispart,youwillhave15minutestogooverthepassagequicklyandanswerthequestionsonAnswerSheet1.Forquestions1-7,choosethebestanswerfromthefourchoicesmarkedA),B),C)andD).Forquestion8-10,completethesentenceswiththeinformationgiveninthepassage.AnimalsontheMoveItlookedlikeascenefrom“Jaws”butwithoutthedramaticmusic.Ahugesharkwaslowlyswimmingthroughthewater,itstailswingingbackandforthlikethependulumofaclock.Suddenlysensitivenerveendingintheshark?sskinpickedupvibrationsofastrugglingfish.Thesharkwasimmediatelytransformedintoadeadly,efficientmachineofdeath.Withmusclestaut,thesharkknifedthroughthewateratarapidspeed.Inaflashthesharkcaughtitsvictim,alargefish,initspowerfuljaws.Then,jerkingitsheadbackandforth,thesharktorehugechunksoffleshfromitsvictimandswallowedthem.Soontheactionwasover.MovingtoSurviveInpursuingitsprey,thesharkdemonstratedinadramaticwaytheimportantroleofmovement,orlocomotion,inanimals.Liketheshark,mostanimalsusemovementtofindfood.Theyalsouselocomotiontoescapeenemies,findamate,andexplorenewterritories.Themethodsoflocomotionincludecrawling,hopping,slithering,flying,swimming,orwalking.Humanshavetheaddedadvantageofusingtheirvariousinventionstomoveaboutinjustaboutanykindofenvironment.Automobiles,rockets,andsubmarinestransporthumansfromdeepoceanstoasfarawayasthemoon.However,forotheranimalsmovementcameaboutnaturallythroughmillionsofyearsofevolution.Oneofthemostsuccessfulexamplesofanimallocomotionisthatoftheshark.Itsabilitytoquicklyzeroinonitspreyhasalwaysimpressedscientists.ButittookadetailedstudybyDukeUniversitymarinebiologistsS.A.Wainwright,F.Vosburgh,andJ.H.Hebranktofindouthowthesharksdidit.Intheirstudyth
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