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1、2012年英语四级考试仔细阅读练习(4)PartIIReadingComprehension (35minutes) Directions:Thereare4passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).Youshoulddecideonthebestchoiceandmarkthecorrespond
2、ingletterontheAnswerSheetwithasinglelinethroughthecenter. Passageone Questions21to25arebasedonthefollowingpassage. Somepessimisticexpertsfeelthattheautomobileisboundtofallintodisuse.Theyseeadayinthenot-too-distantfuturewhenallautoswillbeabandonedandallowedto
3、rust.Otherauthorities,however,thinktheautoisheretostay.Theyholdthatthecarwillremainaleadingmeansofurbantravelintheforeseeablefuture. Themotorcarwillundoubtedlychangesignificantlyoverthenext30years.Itshouldbecomesmaller,safer,andmoreeconomical,andshouldnotbepow
4、eredbythegasolineengine.Thecarofthefutureshouldbefarmorepollution-freethanpresenttypes. Regardlessofitspowersource,theautointhefuturewillstillbethemainprobleminurbantrafficcongestion(拥挤).Oneproposedsolutiontothisproblemistheautomatedhighwaysystem. Whentheauto
5、entersthehighwaysystem,aretractable(可伸缩的)armwilldropfromtheautoandmakecontactwitharail,whichissimilartothosepoweringsubwaytrainselectrically.Onceattachedtotherail,thecarwillbecomeelectricallypoweredfromthesystem,andcontrolofthevehiclewillpasstoacentralcomputer.
6、Thecomputerwillthenmonitorallofthecar’smovements. Thedriverwilluseatelephonetodialinstructionsabouthisdestinationintothesystem.Thecomputerwillcalculatethebestroute,andreservespaceforthecarallthewaytothecorrectexitfromthehighway.Thedriverwillthenbefreetorelaxan
7、dwaitforthebuzzer(蜂鸣器)thatwillwarnhimofhiscomingexit.Itisestimatedthatanautomatedhighwaywillbeabletohandle10,000vehiclesperhour,comparedwiththe1,500to2,000vehiclesthatcanbecarriedbyapresent-dayhighway. 21.Onesignificantimprovementinthefuturecarwillprobablybe__
8、______. A)itspowersource B)itsdrivingsystem C)itsmonitoringsystem D)itsseatingcapacity 22.Whatistheauthor’smainconcern? A)Howtorenderautomobilespollution-free. B)Howt
