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月大学英语四级考试试题,1Part IListening Comprehension20minutesSection ADirections:In thissection,you willhear10short conversations.At theend ofeachconversation,a questionwill be asked aboutwhat wassaid.Both theconversation and thequestion will be spokenonly once.After eachquestion therewill bea pause.During thepause,you mustread thefour choicesmarked A,B,C andD,and decidewhich isthebest answer.Then mark the corresponding letter on the Answer Sheet with a single linethrough thecenter.Example:You willhear:You willread:A Atthe office.B Inthe waitingroom.C Atthe airport.D In a restaurant.From theconversation weknow that the twowere talkingabout somework theywill startat9oclock in the morningand have to finishat2in the afternoon.Therefore,A,5At theofficesthe correctanswer.You shouldchoose[A]on the AnswerSheetand markit withasingle line through thecenter.Sample Answer[A][B][C][D]
1.W:Youve soldyour car.You don,t needoneM:Not really.Tve neverliked drivinganyway.Now thatweve movedto aplace nearthesubway entrance,we canget aboutquite conveniently.Q:What dowe learnfrom the conversationA Theman enjoystraveling bycar.B Theman livesfar from the subway.C Theman isgood atdriving.D Theman usedto owna car.
2.M:Im going to dropmy informationscience class.It meetstoo early in the morning.W:Is thatreally a good reasonto dropthe class,TonyQ:What doesthe womanmeanA Tonyshould continuetaking thecourse.B Sheapproves ofTony5s decision.C Tonycan chooseanother sciencecourse.D She cant meetTony soearlyin themorning.
3.M:If you arent doinganything particular,shall wesee thenew play at theGrand澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!小甜饼.just towork off275calories inone deliciousDanish pastryEven exerciseprofessionals concede half a point here.,5Exercise byitself is a verytough way to loseweight,says YorkOnnen,program directorof thePresidents Councilon PhysicalFitnessand Sports.Still,exercises supportingrole inweight reduction is vital.A studyat the Boston UniversityMedicalCenter ofoverweight policeofficers andother publicemployees confirmedthatthose whodieted withoutexercise regainedalmost alltheir oldweight,while thosewhoworked exerciseinto theirdaily routinemaintained theirnew weight.If you have been极少活动的sedentary and decide tostart walkingone milea day,the addedexercisecould burnan extra100calories daily.In ayears time,assuming noincrease infoodintake,you could lose ten pounds.By increasingthe distanceof yourwalks graduallyandmaking otherdietary adjustments,you maylose evenmore weight.
26.What issaid aboutthe average American in the passageA Theytend toexaggeratethe healthfuleffect of“light beer.B They usually ignorethe effectof exerciseon losingweight.C Theyprefer light”beer andlow-calorie breadto otherdrinks andfood.D Theyknow thefactors thatplaya positive role in keepingdown bodyweight.
27.Somepeople dislikeexercise because they.A think it isphysically exhaustingBfind it hard toexercise whileon adietC dontthink itpossible towalk3miles everydayD findconsulting caloric-expenditure chartstroublesome
28.“Even exerciseprofessionalsconcedehalfapointhere”Line3,Para.2means TheyAagree that the caloriesin asmall pieceof pastrycan bedifficult towork offby exerciseBpartially believediet playsa supportingrole inweight reductionCare notfully convincedthat dietingcan helpmaintain onesnew weightD are notsufficiently informedof thepositive role of exercisein losingweight
29.What wasconfirmed by theBoston University MedicalCenters studyAControlling one5s calorieintake ismore importantthan doingexercise.B Evenoccasional exercisecan helpreduce weight.C Weightreductionisimpossible withoutexercise.D Onecouldlosetenpoundsin ayears timeif there5s noincrease infood intake.澳德网站澳德博客.com澳德咨询电话
867527888675351630.What isthe authorspurpose inwriting thisarticle To.A justifythe studyof theBostonUniversityMedical CenterBstress theimportance ofmaintaining properweightC supportthe statementmade byYork OnnenDshow themost effectiveway tolost weightErt IIIVocabulary20MinutesDirections:There are30incomplete sentencesin this part.For eachsentence there are fourchoicesmarked A,B,C andD.Choose theONE answerthat bestcompletes thesentence.Then markthe correspondingletter on the AnswerSheet witha singleline throughthe centre.
31.The machinelooked likea large,,old-fashioned typewriter.A forcefulB clumsyC intenseD tricky
32.Though shebegan herby singingin alocal popgroup,she isa famousHollywoodmovie star.A employmentB careerC occupation D profession
33.Within twoweeks of arrival,all foreignershad towith thelocal police.Ainquire Bconsult Cregister Dresolve
34.Considering yoursalary,you shouldbe able to at least twentydollars aweek.A putforward Bput upC puton Dput aside
35.As hehas ourpatience,well notwait forhim anylonger.A tornB wastedCexhausted Dconsumed
36.These teacherstry to be objectivewhen theythe integratedability of theirstudents.A justifyB evaluateC indicateD reckon
37.Mrs.Morriss daughteris prettyand,and manygirls envyher.A slenderB lightC faintD minor
38.Tomorrow themayor isto agroup ofCanadian businessmenon atour of thecity.A coordinateB cooperateC accompanyD associate
39.Tm enoughto knowit isgoing to beavery difficultsituation tocompeteagainst threestrong teams.澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!A realisticB consciousCaware Dradical
40.Can yougive meeven theclue asto whereher sonmight beAsimplestB slightestCleast Dutmost
41.Norman Daviswillberemembered bymany withnot onlyas agreat scholarbutalso asa mostdelightful andfaithful friend.A kindnessB friendlinessC warmthD affection
42.Salaries forpositions seemto behigher thanfor permanentones.A legalB optionalC voluntaryD temporary
43.Most peopleagree that the presentrole ofwomen has already affectedU.S.society.,ithas affectedthe traditionalroleofmen.AAbove allB In all C At mostD Atlast
44.Science andtechnology havein importantways to the improvementofagricultural production.A attachedB assistedC contributedD witnessed
45.As anactor hecould communicatea wholeof emotions.A frameB rangeC numberD scale
46.This iswhat you should bearin mind:Dont asalary increasebefore youactuallyget it.A hangon Bdraw onC waitonDcount on
47.The shipsgenerator brokedown,and thepumps hadtobeoperated insteadofmechanically.A artificiallyB automaticallyC manuallyD synthetically
48.The littlegirl wasso frightenedthat shejust wouldnther gripon myarm.A loosenB removeCrelieve Ddismiss
49.He neverarrives ontime andmy isthat hefeels themeetings areuseless.A preferenceB conferenceC inferenceDreference
50.Mrs.Smith wasso abouteverything thatno servantscould pleaseher.A specificB specialC preciseD particular
51.Last nighthe sawtwo darkenter thebuilding,and thenthere was theexplosion.澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!A featuresB figuredC sketchesD images
52.It isobvious thatthis newrule isapplicable toeveryone without.A exceptionB exclusionC modificationD substitution
53.His temperand personalityshow thathecanbecome asoldier of the top.A circleB rankC categoryDgrade
54.During thelecture,the speakeroccasionally hispoint byrelating hisownexperiences.A illustratedB hintedC citedD displayed
55.Only thosewho canto losetheir moneyshould makehigh-risk investments.A maintainB sustainC endureD afford
56.He foundthe mediaattention intolerableanddecideto goabroad.You areusingAUDE LanguagesmaterialsA sufficientB constantC steadyD plenty
57.There has been acollision anumber ofcars on the mainroad totown.A composingB consistingC involvingDengaging
58.elephants aredifferent fromwild elephantsin manyaspects,including theirtempers.A CultivatedB RegulatedC CivilD Tame
59.Ten daysago theyoung maninformed hisboss ofhis intentionto.A resignB rejectC retreatD replace
60.As one of theworlds highestpaid models,she hadher facefor fivemilliondollars.A depositedB assuredC measuredD insuredPart IV Cloze15minutesDirections:There are20blanks in the following passage.For eachblank there are fourchoicesmarked A,B,C andD on the rightside of the paper.You shouldchoose theONEthat bestfits into the passage.Then markthe correspondingletter on theAnswerSheet witha singlelinethrough thecentre.Wise buyingisapositive wayin whichyou canmake yourmoney gofurther.The61you goabout purchasingan articleor aservice canactually62you moneyor澳德网站澳德博客.com澳德咨询电话8675278886753516can add_63_the cost.Take the64example ofa hairdryer.If you are buyinga hairdryer,you might65that youaremaking the66buy if you chooseone67look youlike andwhich isalso thecheapest68price.But when you getit homeyou mayfind thatit69twice aslong asa more expensive70to dryyourhair.The costof theelectricity plusthe costof yourtime couldwell71your hairdryerthemost expensiveone ofall.So whatprinciples shouldyou72whenyougo outshoppingIf you73your home,your caror anyvaluable74in excellentcondition,youll besavingmoney in the long
75.Before youbuy anew76talk tosomeone whoowns one.If youcan useit orborrow itto
61.Aform BwayC methodD fashion
62.A raiseB retainC saveD preserve
63.A toB onC upDin
64.A singleB simpleC easyD similarDthink
65.A convinceB examineC acceptDreasonable
66.A bestB mostC properDwhat
67.A whichB whoseC itsDwith
68.A onB forC inDtakes
69.A spendsB lastsC consumesDsample
70.A modeB modelC copyDprove
71.A makeB causeC leaveDadapt
72.A layB stickC adoptDdecorate
73.A keepB storeC reverseDpossession
74.A productsB materialC ownershipDtime
75.A intervalB periodC runDfacility
76.A equipmentBappliance CutilityD particle
77.A goalBtask CfunctionD component
78.A itemBelement CparticleD that
79.A thisBwhich CwhatD by
80.A inBfrom Cofcheck itsuits yourparticular
77.Part VWriting30minutesDirection:In thissection youare required to writea letterinreply toa friend5s inquiryabout applyingfor admissionto yourcollege oruniversity.Youshould writeatleast120words andbase yourcomposition on the outlinegiven in你认为自己具备了什么条件能力、性格、爱好等能够胜任学生会主席Chinese below:
1.的工作澳德网站澳德博客澳德咨询电话.com
8675278886753516.如果当选，你将为本校同学做些什么2A CampaignSpeech.大学英语四级考试真题参考答案Parti ListeningComprehensionSection A
1.D
2.A
3.A
4.C
5.B
6.D
7.C
8.B
9.C
10.ASection BCompound Dictation
51.quality
52.investigated
53.value
54.familiar
55.recommend
56.perhaps
57.additional
58.Equivalent Germanmodels tendtobeheavier andslightly lesseasy touse.
59.Similarly,it issmaller thanmost of its competitors,thus fittingeasily into a pocketor ahandbag.
510.The onlyproblem wasslight awkwardnessin loadingthe film.Parti IReading Comprehension
11.A
12.D
13.C
14.B
15.A
16.C
17.B
18.D
19.C
20.D
21.D
22.B
23.D
24.A
25.C
26.B
27.B
28.B
29.C
30.DPartlll Vocabulary
31.B
32.B
33.C
34.D
35.C
36.B
37.A
38.C
39.B
40.B
41.D
42.D
43.A
44.C
45.B
46.D
47.C
48.A
49.C
50.D
51.B
52.A
53.B
54.A
55.D
56.B
57.C
58.D
59.A
60.D澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!PartIVCloze
61.C
62.A
63.B
64.C
65.D
66.B
67.B
68.C
69.B
70.D
71.B
72.A
73.D
74.B
75.A
76.A
77.B
78.C
79.A
80.D略Part VWriting澳德网站澳德博客澳德咨询电话.com8675278886753516Theater tonightW:Sounds great.But Tvegot togo overmy notesfor tomorrowsmidterm.Q:What doesthe womanimplyA Shehas tostudy for the exam.B Sheis particularlyinterested inplays.C Sheseager towatch thenew play,D Shecan lendher notesto the man.
4.M:What doyou thinkare theprospects foron-line educationIs itgoingtoreplace thetraditionalschoolW:I doubtit.Schools arehere tostay,becausetheyare muchmore thanjust booklearning.Even thoughmore andmore kidsare goingon-line,I believefew of themwill quitschool altogether.Q:What doesthe womanthink ofconventional schoolsAThey willbe replacedby on-line educationsooner orlater.B Theywill attractfewer kidsas on-line educationexpands.C Theywill continueto existalong withon-line education.D Theywill limittheir teachingto certainsubjects only.
5.M:how domost students find a job after they graduateW:Theyusuallylook for a jobby searchingthe wantads in the newspapers.Q:What doesthe womanmeanA Moststudents wouldlike towork fora newspaper.B Moststudents finda jobby readingadvertisements.C Moststudentsfindithardto get ajobaftertheygraduate.D Moststudents don,t wantjobs advertisedin thenewspapers.
6.M:Allen isin the basement trying to repairthe washing machine.W:Shouldnt hebe workingon histerm paperQ:What doesthe womanthink Allenshould doAMove the washingmachinetothebasement.B Turnthebasementintoaworkshop.C Repairthewashingmachine.D Finishhis assignment.
7.W:Professor Newman,a fewof usatthe back didntgetacopy ofyour readingassignment.M:Well,there are only thirty-eight nameson myclass list,and Ididnt bringany sparecopies.Q:What dowe learnfrom theconversationA Somestudents atthebackcannot hearthe professor.澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!B Theprofessor haschanged his reading assignment.C Someof thestudents arenot on the professorslist.D Theprofessor hasbrought extracopies ofhis assignment.
8.M:Congratulation,Li Ming,YouYe thetalk of the townand thepride ofour classnow.W:If yourereferring tomy winningthe Englishspeech contest,I dontthink itssuch abigdeal.You know,Tve spent two summervacations learningEnglish inCanada.Q:What dowe learnabout LiMing from theconversationAShe doesntwant totalk aboutthe contest.B Shesmodest abouther success inthecontest.C Shesspenttwoyears studyingEnglish inCanada.D Shesvery proudof hersuccessinthe speechcontest.
9.M:Would youpass methe sportssection pleaseW:Sure,ifyougive methe classifiedads andlocal newssection.Q:What arethe speakersdoingA Talkingabout sports.B Writingup localnews.C Readingnewspapers.D Puttingup advertisements.
10.W:If theweather isthis hottomorrow wemay as well giveup theidea ofplayingtennis intheafternoon.M:Oh,I donJtthinkit will lastlong.The weatherforecast saysit willcloud overbymid-afternoon.Q:What doesthemanmeanAThey shouldn5t changetheir plan.B Theydbetter changetheir mind.C Thetennis gamewont lastlong.D Weatherforecasts arenot reliable.Section BCompound Dictation注意听力理解由为复合式听写题目印刷在答题纸上，Section BCompound Dictation,请用黑色钢笔或黑色水笔在答题纸上作答Directions:In thissection,you willhear apassage threetimes.When the passage isreadfro thefirst time,you shouldlisten carefullyfor itsgeneral idea.When thepassage isreadfor thesecond time,youarerequired tofill inthe blanksnumbered fromS1to S7with theexact wordsyou havejust heard.For blanksnumbered from澳德网站澳德博客.com澳德咨询电话8675278886753516S8to S10youarerequiredtofill inthe missinginformation.You can either usethe exactwordsyou havejust heardor writedown themain pointsin yourown words.Finally,whenthe passageisreadfor thethird time,youshouldcheck whatyouhavewritten.There area lotof goodcameras available atthemoment—most of these aremade in Japanbut thereare alsogood S1models fromGermany andthe USA.We haveS2a rangeofdifferent modelsto seewhich isthe bestS3for money.After anumber ofdifferent tests andinterviews with people whoare S4with thedifferent camerasbeing assessed,ourresearchersS5the OlympicBY modelasthe best auto-focus cameraavailableatthemoment.It costs$200although youmay wellwant tospend more—S6as muchasanother$200—on buyingS7lenses andother equipment.It isa goodJapanese camera,easy touse.S8whereas theAmerican versionsare considerablymoreexpensive.The OlympicBY modelweighs only320grams which is quitea bitless thanother camerasofa similartype.Indeed one of theother modelswe lookedat weighedalmost twiceas much.S
9.All the people weinterviewed expressedalmost totalsatisfaction withit.S
10.Part IIReading Comprehension35minutesDirections:There are4passages inthispart.Each passageis followedby somequestionsor unfinishedstatements.For eachof themtherearefour choicesmarked A,B,C andD.You shoulddecide on the bestchoice andmarkthecorrespondingletterontheAnswerSheet withasinglelinethroughthecentre.Passage OneQuestions11to15are basedonthe following passage.Scratchy throats,stuffy nosesand bodyaches allspell misery,but being abletotell ifthe流感cause isa cold or flumay makea differencein howlong the misery lasts.The AmericanLung AssociationALA hasissued newguidelines oncombating colds andthe flu,and one of thekeys isbeingableto quicklytell thetwo apart.Thafs becausethe川prescription drugsavailable for the fluneed tobe takensoon afterthe nesssets in.As forcolds,the soonera personstarts takingover-the-counter remedy,the soonerrelief willcome.The common cold andthe fluare bothcaused byviruses.More than200viruses cancausecold symptoms,while the flu iscaused bythree viruses—flu A,B andC.澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!疫There isno carefor eitherillness,but the flu canbe preventedbythe flu vaccine苗,whichis,for mostpeople,thebestwaytofight the flu,according tothe ALA.But ifthe fludoes strike,quick actioncan help.Although theflu andcommon coldhave manysimilarities,therearesome obvioussigns tolook for.Cold symptomssuch asstuffy nose,runny noseand scratchythroat typicallydevelopgradually,and adultsand teensoften do not geta fever.On theother hand,fever is one ofthecharacteristic featuresof theflu forall ages.And ingeneral,flu symptomsincluding fever川and chs,sore throatand bodyaches comeon suddenlyand are more severethan coldsymptoms.The ALAnotes thatit may be particularlydifficult totell wheninfants andpreschool agechildren have theflu.It advisesparents tocall thedoctor iftheir smallchildrenhave flu-likesymptoms.Both coldand flusymptoms canbe easedwith over-the-counter medicationsaswell.However,children andteens witha cold or flushould nottake aspirinfor painrelief because综合症of therisk ofReye syndrome,a rarebut seriouscondition of the liverand centralnervoussystem.There is,of course,no vaccineforthecommoncold.But frequenthand washingandavoiding closecontact withpeople whohave coldscan reducethe likelihoodof catchingone.
11.According tothe author,knowing thecause of themiserywill help.A shortenthe durationoftheillnessB thepatient buymedicine overthe counter.C thepatient obtaincheaper prescriptiondrugsD preventthepeoplefrom catchingcoldsandtheflu
12.We learnfrom thepassage that.A onedoesnt needto takeany medicineif hehasa coldorthe fluBaspirin should not beincluded inover-the-counter medicinesforthefluC delayedtreatment ofthefluwill harmthe liverand centralnervous systemDover-the-counter drugscanetaken toease themisery causedby acoldortheflu
13.According tothepassage,to combattheflueffectively,one should.A identifythe viruswhich causesitB consulta doctoras soonas possibleCtake medicineupon catchingthe disease澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!D remainalert whenthe diseaseis spreading
14.Which ofthefollowingsymptoms willdistinguish theflu fromacoldA Astuffy nose.B Ahigh temperature.CAsore throat.D Adry cough.
15.If childrenhaveflu-like symptoms,their parents.A areadvised notto givethem aspirinBshould watchout forsigns ofReye syndromeCare encourageto takethem tohospital forvaccinationD shouldprevent themfrom mixingwithpeoplerunning afeverPassage TwoQuestions16to20are basedonthefollowing passage.Inatime oflow academic achievement bychildren inthe United States,many Americansareturning toJapan,a countryof highacademicachievementand economicsuccess,forpossible answers.However,the answersprovided byJapanese preschoolsarenotthe onesAmericansexpected tofind.In mostJapanese preschools,surprisingly littleemphasis isput onacademicinstruction.In oneinvestigation,300Japanese and210Americans preschoolsteachers,child developmentspecialists,and parentswere askedabout variousaspects of答问卷者early childhood education.Only2percent ofthe Japaneserespondents listedtogive childrenagoodstart academically^,as oneof their top threereasons fora society tohave preschools.In contrast,over halfthe Americansrespondents chosethis as oneof theirtop threechoices.To preparechildren forsuccessful careersin firstgrade andbeyond,Japanese schoolsdonotteach reading,writhing,and mathematics,but ratherskills such aspersistence,concentration,andtheability tofunction asa memberofagroup.The vastmajorityof youngJapanese childrenare taughtto readat homeby theirparents.In recentcomparison ofJapanese andAmerican preschool education,91percent ofJapaneserespondents choseproviding childrenwithagroup experience asoneoftheirtopthree reasonsforasocietytohave preschools.Sixty-two percentofthemore individually强调个体发展的oriented Americanslisted groupexperienceasoneoftheirtopthreereasons.An emphasisontheimportance ofthe groupseen inJapanese earlychildhoodeducation continuesinto elementaryschooleducation.澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!Like inAmerica,there isdiversity inJapanese earlychildhoodeducation.Some Japanesekindergartenshave specificaims,suchasearly musicaltraining orpotential development.Inlarge cities,some kindergartensare attachedto universitiesthat haveelementary andsecondaryschools.Some Japaneseparents believethat iftheir youngchildren attendauniversity-based program,itwillincrease thechildrens chancesof eventuallybeingadmitted totop-rated schoolsand universities.Several moreprogressive programshaveintroduced freeplay asa wayout forthe heavyintellectualizing insome Japanesekindergartens.
16.We learntfrom thefirst paragraph that manyAmericans believe.A Japaneseparents aremore involvedin preschoolseducation thanAmerican parentsBJapans economicsuccess isa result ofitsscientific achievementsCJapanese preschoolseducation emphasizesacademic instructionDJapans highereducation insuperior totheirs Youare usingAUDE Languagesmaterials
17.Most Americanssurveyed believethat preschoolsshould alsoattach importancetoA problemsolvingB groupexperienceC parentalguidanceD individually-oriented development
18.1nJapan5s preschooleducation,the focusison.A preparingchildren academicallyBdeveloping childrensartistic interestsCtapping childrenspotentialD shapingchildrens character
19.Free playhasbeenintroduced insome Japanesekindergartens inorder toAbroaden childrenshorizon Bcultivate childrenscreativity Clighten childrensstudy loadDenrich childrensknowledge
20.Why dosome Japaneseparents sendtheir childrento university-based kindergartensTheycan.A dobetter intheir futurestudiesB accumulatemore groupexperience thereCbe individuallyoriented whenthey growup澳德网站澳德博客.com澳德咨询电话8675278886753516追求卓越，成就梦想Lefs makeit happen!D havebetter chancesof gettinga first-rate educationPassageThreeQuestions21to25are basedonthefollowing passage.Lead deposits,which accumulatedin soil and snowduring the1960sand705s,wereprimarily theresultof leaded gasolineemissions originatinginthe United States.In thetwentyyears thatthe Clean Air Act has mandatedunleaded gasuse inthe UnitedStates,thelead accumulationworldwide hasdecreased significantly.A study published recentlyinthe journal Natureshows thatair-borne leadedgas emissionsfromtheUnitedStates werethe leadingcontributor tothe highconcentration of lead inthesnow in Greenland.The new study isa resultofthecontinued researchled by Dr.CharlesBoutron,an expertontheimpact ofheavy metalsontheenvironment atthe NationalCenterfor ScientificResearch inFrance.A studybyDr.Boutron published in1991showed that lead（北极的）levels in arctic snowwere declining.In hisnewstudy,Dr.Boutron foundthe ratios ofthedifferent formsof leadinthe leadedgasoline usedintheUnitedStateswere differentfromtheratiosofEuropean.Asian and（区分）Canadian gasolinesand thusenabled scientiststo differentiatethe leadsources.Thedominant leadratio foundinGreenland snow matchedthat foundin gasolinefromtheUnitedStates.Inastudypublishedinthejournal Ambio,scientists found thatleadlevels in soil intheNortheastern UnitedStates haddecreased markedlysince theintroduction of unleadedgasoline.Many scientistshad believedthatthelead wouldstay insoiland snow fora longerperiod.The authorsoftheAmbio studyexamined samplesoftheupper layersof soiltaken fromthesame sitesof20forest floorsin NewEngland.New Yorkand Pennsylvaniain1980and in199O.The forestenvironment processedand redistributedtheleadfaster thanthe scientistshadexpected.（生态系统）Scientists sayboth studiesdemonstrate thatcertain parts oftheecosystemrespond rapidlyto reductionsin atmosphericpollution,but thatthese findingsshouldnotbeused asa licenseto pollute.）
21.The studypublishedinthejournalNature indicatedthat.A theCleanAirActhas not）produced thedesired resultsB lead deposits inarctic snowareonthe increase澳德网站澳德博客澳德咨询电话.com8675278886753516追求卓越，成就梦想Lefs makeit happen!C leadwill stayinsoilandsnowlonger thanexpectedD theUS isthe majorsource oflead pollution inarcticsnow
22.Lead accumulationworldwide decreasedsignificantly afterthe useof unleadedgas intheUS.A wasdiscouragedB wasenforced bylawC wasprohibited bylawD wasintroduced
23.How didscientists discoverthe sourceofleadpollutioninGreenlandA Byanalyzing thedata publishedin journalslike Natureand Ambio.B Byobserving thelead accumulationsin differentpartsofthe arcticarea.C Bystudying thechemical elementsof soilandsnowin NortheasternAmerica.D Bycomparing thechemical compositionsof leadedgasoline usedin variouscountries.
24.The authorsoftheAmbio studyhave foundthat.A forestsget ridofleadpollution fasterthan expectedBlead accumulationsin forestsaremoredifficult todeal withCleaddepositsare widelydistributed inthe forestsoftheUSD theupper layersof soilin forestsare easilypolluted bylead emissions
25.1t canbe inferredfrom lastparagraphthatscientists.A arepuzzled bythe mysteryof forestpollutionB feelrelieved bythe useofunleadedgasolineC stillconsider leadpollution aproblemD lacksufficient meansto combatbad pollutionPassageFourQuestion26to30are basedonthefollowingpassage.Exercise isoneofthe fewfactors withapositiveroleinlong-term maintenanceof bodyweight.Unfortunately,that messagehasnotgotten throughtotheaverageAmerican,who wouldrather tryswitching tolight”beer andlow-calorie breadthan increasephysicalexertion.The Centersfor DiseaseControl,for example,foundthatfewer thanone-fourth ofoverweight adultswho weretryingtoshed poundssaid theywerecombining exercisewith theirdiet.In rejectingexercise,some peoplemaybediscouraged toomuch bycaloric-expenditurecharts;for example,one wouldhavetobriskly walkthree miles澳德网站澳德博客.com澳德咨询电话8675278886753516。
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