大学英语四级考试试题真题 9.docx
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大学英语四级考试试题真题9
大学英语四级考试试题真题
Passage four
Questions21to25arebasedonthefollowingpassage.
Leaddeposits,whichaccumulatedinsoilandsnowduringthe1960'sand70's,wereprimarilytheresultofleadedgasolineemissionsoriginatingintheUnitedStates.InthetwentyyearsthattheCleanAirActhasmandatedunleadedgasuseintheUnitedStates,theleadaccumulationworld-widehasdecreasedsignificantly.
AstudypublishedrecentlyinthejournalNatureshowsthatair-borneleadedgasemissionsfromtheUnitedStatesweretheleadingcontributortothehighconcentrationofleadinthesnowinGreenland.ThenewstudyisaresultofthecontinuedresearchledbyDr.CharlesBoutron,anexpertontheimpactofheavymetalsontheenvironmentattheNationalCenterforScientificResearchinFrance.AstudybyDr.Boutronpublishedin1991showedthatleadlevelsinarctic（北极的）snowweredeclining.
Inhisnewstudy,Dr.BoutronfoundtheratiosofthedifferentformsofleadintheleadedgasolineusedintheUnitedStatesweredifferentfromtheratiosofEuropean,AsianandCanadiangasolinesandthusenabledscientiststodifferentiate（分区）theleadsources.ThedominantleadratiofoundinGreenlandsnowmatchedthatfoundingasolinefromtheUnitedStates.
InastudypublishedinthejournalAmbio,scientistsfoundthatleadlevelsinsoilintheNorth-easternUnitedStateshaddecreasedmarkedlysincetheintroductionofunleadedgasoline.
Manyscientistshadbelievedthattheleadwouldstayinsoilandsnowforalongerperiod.
TheauthorsoftheAmbiostudyexaminedsamplesoftheupperlayersofsoiltakenfromthesamesitesof30forestfloorsinNewEngland,NewYorkandPennsylvaniain1980andin1990.
Theforestenvironmentprocessedandredistributedtheleadfasterthanthescientistshadexpected.
Scientistssaybothstudiesdemonstratethatcertainpartsoftheecosystem（生态系统）respondrapidlytoreductionsinatmosphericpollution,butthatthesefindingsshouldnotbeusedasalicensetopollute.
26.ThestudypublishedinthejournalNatureindicatesthat
A）leaddepositsinarcticsnowareontheincrease
B）theCleanAirActhasnotproducedthedesiredresults
C）theUSisthemajorsourceofleadpollutioninarcticsnow
D）leadwillstayinsoilandsnowlongerthanexpected
27.LeadaccumulationworldwidedecreasedsignificantlyaftertheuseofunleadedgasintheUS
A）wasintroduced
B）wasdiscouraged
C）wasprohibitedbylaw
D）wasenforcedbylaw
28.HowdidscientistsdiscoverthesourceofleadpollutioninGreenland?
A）ByanalyzingthedatapublishedinjournalslikeNatureandAmbio.
B）BystudyingthechemicalelementsofsoilandsnowinNortheasternAmerica.
C）Bycomparingthechemicalcompositionsofleadedgasolineusedinvariouscountries.
D）Byobservingtheleadaccumulationsindifferentpartsofthearcticarea.
29.TheauthorsoftheAmbiostudyhavefoundthat
A）forestsgetridofleadpollutionfasterthanexpected
B）leaddepositsarewidelydistributedintheforestsoftheUS
C）leadaccumulationsinforestsaremoredifficulttodealwith
D）theupperlayersofsoilinforestsareeasilypollutedbyleademissions
30.Itcanbeinferredfromthelastparagraphthatscientists
A）lacksufficientmeanstocombatleadpollution
B）stillconsiderleadpollutionaproblem
PartIIIVocabulary（20minutes）
Directions:
Thereare30incompletesentencesinthispart.ForeachsentencetherearefourchoicesmarkedA）,B）,C）andD）.ChoosetheONEanswerthatbestcompletesthesentence.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecentre.
31.Salariesforpositionsseemtobehigherthanforpermanentones.
A）temporary
B）voluntary
C）optional
D）legal
32.Mrs.gmithwassoabouteverythingthatnoservantscouldpleaseher.
A）precise
B）particular
C）speCific
D）speCial
33.Histemperandpersonalkyshowthathecanbecomeasoldierofthetop
A）circle
B）category
C）grade
D）rank
34.Therehasbeenacollisionanumberofcarsonthemainroadtotown.
A）engaging
B）composing
C）involving
D）consisting
35.NormanDaviswillberememberedbymanywithnotonlyasagreatscholarbutalsoasamostdelightfulandfaithfulfriend.
A）friendliness
B）affection
C）kindness
D）warmth
36.Scienceandtechnologyhaveinimportantwaystotheimprovementofagriculturalproduction.
A）witnessed
B）assisted
C）attached
D）contributed
37.Heneverarrivesontimeandmyisthathefeelsthemeetingsareuseless.
A）conference
B）inference
C）preference
D）reference
38.Onlythosewhocantolosetheirmoneyshouldmakehigh-riskinvestments.
A）afford
B）endure
C）sustain
D）maintain
39.Tendaysagotheyoungmaninfo~edhisbossofhisintentionto
A）reject
B）retreat
C）resign
D）replace
40.Thoughshebeganherbysinginginalocalpopgroup,sheisnowafamousHollywoodmoviestar.
A）profession
B）employment
C）occupation
D）career
41.Ashehasourpratience,we’llnotwaitforhimanylonger.
A）exhausted
B）wasted
C）torn
D）consumed
42.TomorrowthemayoristoagroupofCanadianbusinessmenonatourofthecity.
A）cooperate
B）accompany
C）coordinate
D）associate
43.MostpeopleagreethatthepresentroleofwomenhasalreadyaffectedU.S.society.
ithasaffectedthetraditionalroleofmen.
A）Aboveall
B）Inall
C）Atmost
D）Atlast
44.Itisobviousthatthisnewruleisapplicabletoeveryonewithout
A）exclusion
B）substitution
C）modification
D）exception
45.Asoneoftheworld'shighestpaidmodels,shehadherface.forfivemilliondollars
A）despoiled
B）measured
C）insured
D）assured
46.Themachinelookedlikealarge,，old-fashionedtypewriter.
A）clumsy
B）tricky
C）forceful
D）intense
47.Withintwoweeksofarrival,allforeignershadtowiththelocalpolice
A）inquire
B）register
C）consult
D）profession
48.I'menoughtoknowitisgoingtobeaverydifficultsituationtocompeteagainstthreestrongteams.
A）aware
B）conscious
C）radical
D）realistic
49,Hefoundthemediaattentionintolerableanddecidedtogoabroad.
A）constant
B）sufficient
C）steady
D）plenty
50,elephantsaredifferentfromwildelephantsinmanyaspects,includingtheirtempers.
A）Civil
B）Tame
C）Cultivated
D）Regulated
PartIVCloze（15minutes）
Directions:
Thereare20blanksinthefollowingpassage.ForeachblanktherearefourchoicesmarkedA）,B）,C）andD）ontherightsideofthepaperYoushouldchoosetheONEthatbestfitsintothepassage.ThenmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecentre.
Wisebuyingisapositivewayinwhichyoucanmakeyourmoneygofurther.The61goaboutpurchasinganarticleoraservicecanactually62youmoneyorcanadd63thecost.
Takethe64exampleofahairdryer.Ifyouarebuyingahairdryer,youmight65youaremakingthe66buyifyouchooseone67lookyoulikeandwhichisalsothecheapest68price.Butwhenyougetithomeyoumayfindthatit69twiceaslongasamoreexpensive70todryyourhair.Thecostoftheelectricityplusthecostofyourtimecouldwell71yourhairdryerthemostexpensiveoneofall.
Sowhatprinciplesshouldyou72whenyougooutshopping?
Ifyou_73yourhome,yourcaroranyvaluable74inexcellentcondition,you'llbesavingmoneyinthelong75Beforeyoubuyanew76,talktosomeonewhoownsone.Ifyoucan,useitorborrowittocheckitsuitsyourparticular77.
Beforeyoubuyanexpensive78,oraservice,docheckthepriceand79isonoffer.Ifpossible,choose80threeitemsorthreeestimates.
61.A）formL
B）way
C）method
D）fashion
62.A）raise
B）retain
C）save
D）preserve
63.A）to
B）on
C）up
D）in
64.A）single
B）simple
C）easy
D）similar
65.A）convince
B）examine
C）accept
D）think
66.A）best
B）most
C）proper
D）reasonable
67.A）which
B）whose
C）its
D）what
68.A）on
B）for
C）in
D）with
69.A）spends
B）lasts
C）consumes
D）take
70.A）mode
B）copy
C）model
D）sample
71.A）make
B）cause
C）leave
D）prove
72.A）lay
B）stick
C）adopt
D）adapt
73.A）keep
B）store
C）reserve
D）decorate
74.A）products
B）material
C）ownership
D）possession
75.A）interval
B）period
C）run
D）time
76.A）equipment
B）appliance
C）utility
D）facility
77.A）goal
B）task
C）function
D）purpose
78.A）item
B）element
C）particle
D）component
79.A）this
B）which
C）what
D）that
80.A）in
B）from
C）of
D）by
PartVWriting（30minutes）
Directions:
Forthispart,youareallowed30minutestowriteacampaignspeechinsupportofyourelectiontothepostofchairmanofthestudentunion.Youshouldwriteatleast120wordsfollowingtheoutlinegivenbelowinChinese.
ACampaignSpeech
1你认为自己具备是什么条件（能力，性格，爱好）可以胜任学生会主席工作，
2如果当选你将会为本校同学做什么？
参考答案
PartⅠListeningComprehension
SectionA
1.C）Themanusedtoownacar
2.D）Tonyshouldcontinuetakingthecourse.
3.A）Shehastostudyfortheexam.
4.B）Theywillcontinuetoexistalongwithon-lineeducation.
5.C）Moststudentsfindajobbyreadingadvertisements.
6.A）Finishhisassignment.
7.C）Someofthestudentsarenotontheprofessor’slist.
8.D）She’smodestabouthersuccessinthecontest.
9.A）Readingnewspapers.
10.B）Theyshouldn’
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