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PartIClozeTestDirections:Thispart,numbered1to15,istotestyourgrammarandvocabularyability。Eachoftheblanks(N0.1toNo。15)isfollowedbyfourchoicesofsuggestedchoicesmarkedA),B),C)andD).MakethebestchoiceandwritethecorrespondingletterontheAnswerSheet。Workersaren'tallowedtogointoahugeundergroundcomputercenter1theystepuptoamachinethat2aquickpictureofthetinybloodvessels(管)insidetheireyes.Ifthemachinecan’t3thepicturewithimagesinitscomputer,theworkeris4bysecurity(安全)guards。Eachpersonhashisownpatternofbloodvesselsinhisorhereyes。Andunlikeakey,thepatterncan'tbe5.Old—-fashionedkeysandlocksmaysoonbethingsofthepast.High--techsecuritydevices(装置)arebeing6atmilitarybases,computercenters,nuclearplantsandbanks.Companiesthat7themachinessaythey'llsomedaybeusedinpeople’shomesandcars.Already,aJapanesefirmhasfixeddevicesthat8people’sfingerprintsin360newhomes。Themachinesopenthedoorsonlyforthe9ofthehouses.Thenewsecuritydevicesaresellingwellbecausethievesandspiesaregettingbetteratbreaking10buildingsandcomputersthatareprotectedby11.Since12canstealorcopyafingerprintoreyepattern,thenewmachinesare13。14newmachinesrecognizevoicepatterns.TwoAmericancompaniesusevoice——recognitionmachinestokeepaneyeontheircomputers。Inexpensivevoice--recognitionmachinesmaysomeday15locksoncars。Thedoorswouldopenonlyfortheowners.Thedeviceswouldcosttheownersaslittleas$270。Althoughtheup--to——datedevicesareamazing,scientistsmuststillsolvea(n)seriousproblem。Howwi11aboyborrowhisdad’scarwithoutborrowingdad’svoice?1。A。ifB。evenifC。untilD。after2.A.takeB.giveC。drawD.show3。A.matchB。fitC。compareD。share4.A。caughtB。killedC.beatenD。stopped5.A。borrowedB。missedC。stolenD。bought6。A。fixedB。dealtwithC。repairedD。checked7.A。buyB。sellC.makeD。copy8。A。rememberB.storeC.countD。recognize9.A。makersB.buyersC.sellersD.owners10.A。throughB.inC.intoD.out11.A。computersB.securitydevicesC.camerasD.keysandlocks12。A。nobodyB。everybodyC.anybodyD。somebody13.A。safeB。unusualC.helpfulD.useful14。A。OtherB.AnotherC。MoreD.Others15。A。takeplaceofB。replaceC.takeplaceD.placebackPar