2000年6月研究生英语学位考试全真试卷qym

各类专业好文档，值得你下载，教育，管理，论文，制度，方案手册，应有尽有各类专业好文档，值得你下载，教育，管理，论文，制度，方案手册，应有尽有2000年6月研究生英语学位考试全真试卷PAPERONEPARTLISTENINGCOMPREHENSION(15minutes,5points)SectionA(1pointeach,)Directions:Inthissection,youwillhearnineshortconversationsbetweentwoSpeakers.Atthe1endofeachconversation,aquestionwillbeaskedaboutwhatwassaid.Thequestionsandtheconversationswillbespokenonlyonce.ChoosethebestanswerfromthefourChoicesgivenbymarkingthecorrespondingletterA,B,C,orDohyouranswerSheet.1.A.Notsoeasy.B.Easierthanshethought.C.Ratherdifficult.D.Asdifficultassheexpected.2.A.ShecanturntheTVoff. B.Sheshouldwatchtheplaywithhim.C.Theplaywillbeoversoon.D.ShecouldleavetheTVon3.A.500,000B.5,700,000C.5,170,000D.7,500,0004.A.Hiswifedoesn'tlikedinnerparties. B.He'llbebusyonSaturday.C.Heisgoingdowntownthen.D.Hiswifewillbeaway.5.A.Pickupthepackageatthepostoffice.B.Deliverthepackageinperson.C.Asktohavethepackagedeliveredtohishome.D.Findoutthehoursthepostofficeisopen.6.A.Makeacopyofthekeyforthewoman.B.Givethewomanherkeyatherclass.C.Putthekeyinthewoman'smailbox.D.Unlockthewoman'sdoor.7.A.Makesuretheregistrationofficedidn'tmakeamistake.B.Decidewhethertodropthecoursenextweek.C.Findoutifaplaceopensupinthecourselater.D.Takethecoursenextyear.8.A.ThecurrencysysteminEurope.B.TheeconomicsituationinGermany.C.InflationinEuropeanmarket.D.Theadvantagesofastablesociety.9.A.Speaktohisprofessorabouttheconditionofthelecturehall.B.Organizeateamofstudentstocleanthelecturehall.C.Findoutwhohasbeenmakingamess.D.Waittoseeiftheproblemgoesaway.SectionB(1pointeach)Directions:Inthissection,youwillheartwoshortpassages.Attheendofeachpassage,therewillbesomequestions.Boththepassagesandthequestionswillbereadtoyouonlyonce.Aftereachquestion,therewillbeapause.Duringthepause,youmustchoosethebestanswerfromthefourchoicesgivenbymarkingthecorrespondingletterA,B,CorDonyourAnswerSheet.Passage1Questions10through12arebasedonthefollowingpassage.10.A.Scientistsweremoreofmenofideasthanofmenofskills.B.Scientistshadahighersocialstatusthanengineers.C.Engineershadastrongerdesireforknowledgeandorder.D.Engineersweremoreintelligentthanscientists.11.A.HewasaBritishastronomerandphysicistinthe18thcentury.B.HewasthefirstpersonwhoappliedNewton'stheoryintopractice.C.Hewas;creditedwithhisscientifictheoriesaswellashisinventions.D.HewasthescholarwholaidtheoreticalfoundationforNewton'sinvention.12.A.Itshouldbedetachedfromengineering,B.Ifiscloselyrelatedtoengineering.C.Ithasbeenvalidlycomparedwithengineeringinhistory.D.Itmustbeprovedbeforeitisaccepted.Passage2Questions13through15arebasedonthefollowingpassage.13.A.Thegreatleadersoftheworld.B.Whatthecommonpeopleneedtoday.C.Thecharacteristicsofasuccessfulperson.D.Whatgreatleadershaveincommon.14.A.Two.B.Three.C.FiveD.Six15.A.Amadmanservesonlyhispersonalambition.B.Atrulygreatleaderdoesnotconcentrateonhisobjectivesonly.C.Amadmanmaylosesightofhisobjectivessometimes.D.Atrulygreatleaderdoesnotbelievethattheendjustifiesthemeans.PARTIIVOCABULARY(10minutes,l0points)SectionA(0.5pointeach)Directions:Therearetensentencesinthissection.Eachsentencehasonewordunderlined.BelowthesentencearefourwordsmarkedA,B,CandD.Choosethewordthatisclosestinmeaningtotheunderlinedone.MarkthecorrespondingletteronyourAnswerSheet.16.Aspecialcommitteehasbeenappointedtoidentifytheunderlyingcauseforthemedicalaccident.A.unknownB.undeniableC.fundamentalD.relevant17.Needlesstosay,one'schanceofbeingemployedwillbemuchenhancedwithauniversitydegree.A.encouragedB.enforcedC.increasedD.enlightened18.Itisreportedthatthespacemissionwasabortedbecauseofmechanicaltrouble.A.terminatedB.alteredC.confirmedD.dispatched19.Humanfacialexpressionsdifferfromthoseofanimalsinthedegreetowhichtheycanbedeliberatelycontroledandmodified.A.cautiouslyB.absolutelyC.inherentlyD.intentionally20.Inastronomy,ascaleofmagnitudefromonetosixdenotesthebrightnessofastar.A.signifiesB.predictsC.contrasts-D.examines21.Sincethecouplecouldnotreconciletheirdifferences,theydecidedtogetadivorce.A.tackleB.settleC.undertaken.D.minimize22.Althoughdolphinssometimesswimsinglyorinpairs,theyusuallycongregateinlargeherds,oftennumberinginthehundreds.A.generateB.inhabitC.resideD.assemble23.TrashrecyclingisbecominganincreasinglyviableoptionforwastedisposalA.controversialB.expensive.C.feasibleD.debatable24.Ittakestimetomakeanoverallassessmentoftheproject,whichwaslaunchedfiveyearsago.A.appreciationB.evaluationC.condemnationD.recommendation25.Theframeworkofthespecialtheoryofrelativitycanbeconstructedfromtheassumptionoftheabsoluteinvariabilityofthespeedoflight.A.argumentationsB.suppositionC.conclusionD.definitionSectionB(0.5pointeach)Directions:Therearetensentencesinthissection.Eachsentencehassomethingomitted.Choosethewordfromthefourchoicesgiventobestcompleteeachsentence.MarkthecorrespondingletteronyourAnswerSheet..26.Hedidnotfeelobligedto____totherulesthatappliedtoordinarymen.A.confrontB.conformC.confineD.console27.InBritaintherobinisasmallbird,butits_________inAmericaismuchlarger.A.speciesB.counterpartC.analogyD.category28.InthiswaytheCopyrightActof1956laysdownthattranslatingislegalonlywhenitisdonewiththeauthor's_________.A.consentB.compassionC.discountD.disregard29.Aviolentthunderstormwas_________asdarkcloudywerecollectingoverhead.A.eminentB.imminentC.instantaneousD.simultaneous30.IllnessforcedMrs.Smithto__________herselftoallvisitors,soshebecamelonelier.A.deprivedB.chargedC.persistentD.innocent31.Itturnedoutthatthemansuspectedofmurderinghisbosswas_______oftheallegations.A.deprivedB.chargedC.persistentD.innocent32.The_____crownjewelsarekeptintheTowerofA.invariableB.invaluableC.invincibleD.invisible33.Myaunt______abrightly-coloredthreadroundherfingersoasnottoforgetherappointment.A.woundB.curvedC.spunD.bent34.Ifsomething_____aneventorsituation,usuallyabadone,itcausesittohappensuddenlyorsoonerthannormal.A.protectsB.precipitatesC.presidesD.detects35.Companiesspendmillionsofdollarsonadsandcommercials,trying_____Americanpublicintopurchasingtheirproducts,A.misplaceB.mockC.maneuverD.manifestPARTIIICLOZETEST(lOminutes,15pointe)Directions:Readthepassagethrough.ThengobackandchooseonesuitablewordmarkedA,,B,CorDforeachblankinthepassage.MarkthecorrespondingletterofthewordyouhavechosenwithasinglebaracrossthesquarebracketsonyourMachine-scoringAnswerSheet.Itreflectsbadlyontheorderofprioritiesinoursocietythatschoolchildrencantellyouthemakeofmanycarsohthe;roadbut.cannotidentifyanybutthemostfamiliartreesandwild.-flowers.Thisis_36_,generallyspeaking,theeducationalsystemoftheUnitedStatesis,_37_indoorstoadegreethatstiflesyoungmind's.Fewschoolstake38ofthevastclassroomoftheoutdoorstoteachthethingsthatreally39—thebasicsoflifeona__40__planet.Childrenstudyinsectsinpapercupsinsideaclassroominsteadof41theirknowledgefilledoutbyexaminingthe42environmentinwhichthesecreatures__43__live.Thisisapity,becauseachildisnormallynature'smost44student.Everyparentknowsthenatural45ofsmallchildrentobringhomecaterpillars,grasshoppers,toads,andothersmalllivingthings._46_parentsrarelyencouragethisinstinctiveattractionby__47__aknowledgeofnaturetotheirchildren.48often,theinterestofchildreninthenaturalworldis49bytheexampleoftheireldersintoaconcentrationontheinanimate_50_thatmoneywillbuy.36.A.becauseB.sinceC.why D.that37.A.extendedB.squeezedC.scattered D.sprinkled38.A.profitB.advantageC.benefit D.advancement39.A.interest B.concernC.mind D.count40.A.Threatened B.frightened.C.discarded D.discouraged41.A.finding B.trying C.taking D.having.42.A.complete B.comparable C.competitive D.comparative43.A.certainly B.naturally C.precisely D.especially44.A.earnest B.solemnC.casual D.random45.A.attempt B.custom: C.tendency D.attendance46.A.And B.So C.Therefore D.But47.A.imparting B.grantingC.transforming D.emitting48.A.Soon B.Too C.Indeed D.Seldom49.A.conveyed B.diverted C.altered D.delivered50.A.staff B.equipment C.objects D.subjectsPARTIVREADINGCOMPREHENSION(45minutes,30points)Directions:Inthispartofthetest,therearefivepassagesforyoutoread.Readeachpassagecarefullyandthendotilequestionsthatfollow.ChoosemerestanswerA,B,C,orD,andmarkthecorrespondingletteroilyourAnswerSheetLifeinsuranceisn'tfuntobuy.Itforcesyoutothinkaboutyourdeath:asubjectmanyprefernottoconfront.Butthere'sasingle,overridingreasontobuylifeinsurance:toprovideanincomeforyourdependentsshouldyoudie.Don'tdependsolelyonanagenttofigureyourlifeinsuranceneeds.Ruleofthumbestimatessuchasfiveoreighttimesyourincomeareguesses;theymayproducetoolittleortoomuchinsurance.Carrytoolittleinsuranceandyoumaynotprovideareasonablestandardoflivingforyourfamilyafteryourdeath.Mostpeoplewhohavelifeinsurancedon'thaveenough.Themedianamountofcoverageforalladultswithlifeinsurancewasonly5,000poundsin1984.That'sobviouslynotenoughtosustainafamilywithyoungchildrenforverylong;Nationwideinsurancefoundthatthemarriedmeninits1984surveycarriedanaverageofabout101,880poundsinlifeinsurance;theyneededabout100,705poundsmore.Marriedwomencarriedabout43,516worth.insurancebutneededsome98,507poundsmore.Howdoyoudeterminetheamountoflifeinsuranceyouwouldneedtomaintainyourfamily'scurrentlife-styleifthebread-winnerdied?First,figurewhatyourfamilyexpenseswouldbeifyoudiedtomorrow.Then,analyzeyourassetsandthesourcesofincomethatyoucanusetocovertheexpenses.Finally,subtracttheassetsfromtheneeds.Theresultistheamountofadditionalinsurancethatyou'llneedtobuy.51.ThepassageintendstotellusA.whypeoplearenotinterestedinbuyinglifeinsurance.B.howimportantlifeinsuranceisinmaintainingadecentlife-styletoday.C.whylifeinsurancehasalwaysbeensoprofitable.D.howtodeterminetheamountoflifeinsuranceyouwouldneed.52.Lifeinsuranceisn'tfuntobuybecauseA.It'sunpleasanttotalkaboutone'sdeath.B.thereisasingle,overridingreason.C.itisnoteasytobuyreliablelifeinsurance.D.itforcesyoutothinkaboutyouradditionalexpenses.53.WhichofthefollowingstatementisNOTtrue?A.Insuranceestimatessuchasfiveoreighttimesyourincomearenotappropriate.B.Insurancecoveragesometimesmaycarrytoolittlebenefitsforthecustomer.C.Youyourselfshouldhaveanideaabouthowmuchlifeinsuranceyouneed.D.Youshouldinanycaserelyohanagenttobuyyourlifeinsurance.54.Ifyoucarrytoolittleortoomuchinsurance,A.eitheryouoryourfamilymightsuffer.B.youmaynotprovideareasonablestandardoflivingforyourfamilyafteryourdeath.C.youmaynotenjoyreasonablestandardoflivingwhileyou'realiveD.youwillknowintheendthattheyarejustwildguesses55.AllofthefollowingshouldbetakenintoaccountindeterminingtheamountofyourlifeinsuranceexceptA.Analyzingyourassetsandsourcesofincome.B.Addingupthenumberofyourdependents.C.Estimatingyourfamily'sexpenses.D.Takeawaytheassetsfromyourbudget.(2)Theinstrumentsofpropagandaarethemselvesbusinesscorporationsorganizedandfinancedforprofit,andtheyaresubjecttothoseinfluencesthatconditionandareconditionedbythesystemoffreeeconomicenterprise.Newspapersarefreetoprintallthenewsthat'sfittoprint;buttheycannotconsistentlypropagateideasthatwillalienate(tocausetobedetached)thebusinessinterestswhosepaidadvertisementsenablethemtodistributeprofitstothestockholders.Broadcastingcorporationsarefreefromgovernmentcensorship(inspection),orreasonablyfreetobroadcastwhattheywill;butinthelastanalysistheywillnotbroadcastthatwhichseriouslyoffendstheprevailingcustomsorthebusinessenterpriseswhich,inthiscountryatleast,sponsorandfinancetheirprogramsofentertainment.Indemocraticsocietiesfreeandimpartialdiscussion,fromwhichthetruthissupposedtoemerge,ispermittedanddoesoccur.Butthethinkingofaveragemanislargelyshapedbyawealthoffactualinformationandtheconflictingopinionswhichtheselectiveprocessofcompetitivebusinessenterprisepresentstohimforconsideration:information,thetruthofwhichhecannotverifyideas,formulatedbypersonshedoesnotknow,andtooovertlyinspiredbyprivateeconomicintereststhatareneverdeclared.56.ThepassageshowsthatthethinkingofmostpeopleisinfluencedbyA.thesocialclasstowhichtheybelong.B.thelovetheycherishfortheircountry.C.informationpresentedtothembybusinessenterprises.D.governmentcensorship.57.AfactaboutbusinessenterprisementionedinthepassageisthatitA.sponsorsradiobroadcasts.B.isopposedtolaborunions.C.hascompletelyminedfreeandimpartialdiscussion.D.realizesitsresponsibilitiestothepublic.58.Whatdeterminestheprogramsthatthecorporationsbroadcast?A.Goodtastesofthepublic.B.Theirdesiretopreservefreedomofspeech.C.Theinterestsofthepeoplewhosponsortheirprograms.D.Thepropagationofideas.59.TheauthorpointsoutthattheprevailingcustomsA.supportfreeandimpartialdiscussion.B.puttoomuchemphasisonmoney-making.C.restrictwhatcanbebroadcasteventually.D.arebeinginfluencedbytheinstrumentsofpropaganda.60.ThepassagestatesthatnewspapersandbroadcastingcorporationsA.arethefoundationsofdemocracy.B.entertainratherthaninformthepublic.C.reportthenewsimpartially.D.arebusinessorganizations.61.Inspiteofawealthofinformationprovidedbythemedia,theauthorimplies,that.A.theaveragepeople'sthinkingcanhardlybeobjective.B.democraticdiscussionsoccurveryinfrequently.C.businessesoftenhaveconflictingopinionswithmedia.D.privateenterprisesalwaysmaketheirinterestsknowntothepublic.(3)Fordecades,themajorityofcollegestudentswerebetweenthetraditionalageof18-22.But,since1994,themajorityofcollegestudentshavebeenovertheageof22.In1995,theUSCensusBureaurecordedthatoneinfourcollegestudentswas30yearsorolder.Inthe1960sandearly1970s,womenwhoreturnedtoschoolusuallystudiedthingslikeart,historyandliterature."Today,thevastmajorityarereturninginordertogetcredentials(qualifications,certificates)thatwilladvancethemprofessionally,"saysJadigaSebrechts,executivedirectoroftheWomen'sCollegeCoalitioninWashington.DepartmentofEducationstatisticsshowthatthetopfieldsofstudyforreturningwomenareeducation,healthandsocialwork.Moreadultwomenthanmenreturntoschoolbecausemoremenover35alreadyhavedegrees.Only18percentofwomen25andolderhavecollegedegreescomparedtoabout23percentofmeninthesameagerange,accordingtotheInstituteofWomen'sPolicyResearchManytypesofwomenreturntoschool:divorceessuddenlysaddledwithprimaryresponsibilityfortheirchildren'sfuture,welfaremothersaspiringtobetterlivingstandards,homemakerswantingtoresumeinterrupted-studiesoncetheirkidsareolder,middle-classwiveslookingforindependenceandfulfillment,evengrandmotherraisingtheirchildren'skids.Itisdifficulttomeasurethelevelofsuccessolderwomenachieveintheworkplaceaftertheirreturntoschool.ButasSebrechtspointsout,theimpactofadultwomenstudentsisvisibleinmegrowingnumberofolderwomenenteringtheworkforce.TheHudsonInstitutenotedinitspublicationWorkforce2020thatparticipationratesintheworkforceforfemales55andolderhavebeenrisingsteadilyforadecadeandappeartocontinueasagenerationofbetter-educatedworkingwomenmovesupwardfromthe45-54year-oldcategory.Althougholderwomendofacethepotentialofbothageismandsexism,theAmericanjobmarketisbecomingmoreelder-friendly,withmorethan70percentofAmericanworkersbeingover50yearsold,accordingtotheDepartmentofLabour.Theinfluxofolderstudentsontocampuseshasaffectedclassroomculture.Adultlearnerstendtobemorechallenging,saysSebrechts.Theyarenotshyaboutexpressingtheiropinionsoraskingquestions.Theirexpectationsareextremelyhighsotheykeepfacultymembersontheirtoesinawaythatevenfairlyassertivetraditional-agestudentsdonot.Olderwomenoftenfearthattheywillbeunabletocopewiththeacademicload,buttheirconfidenceincreasesdramaticallyoncethefirstcourseisundertheirbelt,saysSebrechts.Adultwomengenerallygetbettergradesthanbothyoungerstudentsandmenofthesameagegroup.Hayesattributesthisbothtothedeterminationofolderwomentoimprovetheirlivesandtothelackofself-confidencewhichpropelsthemtoworkhardertocompensatefortheirimaginedshortcomings.62.Mostwomenover30returntoschoolnowtoA.studyart,historyandliterature.B.studyforthebenefitoftheirchildren.C.getadegreeforpromotion.D.lookforenjoyment..63.ItcanbeinferredfromthepassagethatAmericanwomenareA.becomingmoreimpractical.B.gettingmoreequalwithmen.C.moreselfishthanmen.D.turningmoreoffensive.64.AccordingtothepassageA.moreandmoreolderwomenarebeingemployed.B.olderwomenachievenosuccessaftertheirreturntoschool.C.olderwomenaremoreintelligentthanyoungerstudents.D.olderwomenstudentsstepontheirteachers'toes.65:WecanmostcertainlyconcludefromthepassagethatoldwomenstudentsA.areveryannoying.B.workveryhardatschool.C.areverytraditional.D.lackself-confidence.66.Thephrase"undertheirbelt"inthe7thparagraphmostprobablymeansA.underconsideration.B.completelyreviewed.C.learnedsuccessfully.D.underdiscussion.67.'Theauthor'sattitudetowardwomenisA.discriminating.B.disapproving.C.approving.D.indifferent..(4)IhadscarcelypassedmytwelfthbirthdaywhenIenteredtheinhospitableregionsofexaminations,throughwhichforthenextsevenyearsIwasdestinedtojourney.Theseexaminationswereagreattrialtome.ThesubjectswhichweredearesttotheexaminerswerealmostinvariablythoseIfanciedleast.Iwouldhavelikedtohavebeenexaminedinhistory,poetryandwritingessays.Theexaminers,ontheotherhand,werepartialtoLatinandmathematics.Andtheirwillprevailed.Moreover,thequestionswhichtheyaskedonboththesesubjectswerealmostinvariablythosetowhichIwasunabletosuggestasatisfactoryanswer.IshouldhavelikedtobeaskedtosaywhatIknew.TheyalwaystriedtoaskwhatIdidnotknow.WhenIwouldhavewillinglydisplayedmyknowledge,theysoughttoexposemyignorance.Thissortoftreatmenthadonlyoneresult:Ididnotdowellinexaminations.ThiswasespeciallytrueofmyEntranceExaminationtoHarrow.Theheadmaster,DrWelldon,however,tookabroad-mindedviewofmyLatinprose:heshoweddiscernment(insight)injudgingmygeneralability.Thiswasthemoreremarkable,becauseIwasfoundunabletoanswerasinglequestionintheLatinpaper.Iwrotemynameatthetopofthepage.Iwrotedownthenumberofthequestion"I".AftermuchreflectionIputabracketrounditthus"(I)".ButthereafterIcouldnotthinkofanythingconnectedwithitthatwaseitherrelevantortrue.Incidentallytherearrivedfromnowhereinparticularablotandseveralsmudges.IgazedfortwowholehoursatthissadspectacleandthenmercifulusherscollectedmypieceoffoolscapwithalltheothersandcarriedituptotheHeadmaster'stable.ItwasfromtheseslenderindicationsofscholarshipthatDr.WelldondrewtheconclusionthatIwasworthytopassintoHarrow.Itisverymuchtohiscredit.Itshowedthathewasamancapableoflookingbeneaththesurfaceofthings;amannotdependentuponpapermanifestations.Ihavealwayshaddiegreatestregardforhim.68.Towhichofthefollowingistheword"fancied"inline4closestinmeaning?A.imaginedB.thoughtC.likedD.impressed69.Theauthorconsideredexaminations"inhospitableregions"tohim,becauseA.hehadthesamefeelingashewasinahospital.B.theexaminerswerenotreadytoexposehisignorance.C.hewasunabletoperformwellintheexamination.D.theexaminersneverconsideredthechildren'swillintheexaminations.70.Impliedbutnotstatedinthispassage:A.Teachersshouldexaminethestudiesofchildreninabroaderandfairerway.B.SubjectssuchasLatinandmathematicsmightnotbeasusefulasteachersthought.C.Talentedstudentsshouldbetreatedandtaughtindividually.D.Brilliantstudentsoftenfindexamsboringandmeaningless.71.TheauthorwasadmittedintoHarrowalthoughhehaddonepoorlyintheentranceexaminationprobablybecauseA.theauthoralwayshadthegreatestregardforDr.Welldon.B.theblotandsmudgestheauthorputonhisexaminationpaperrevealedhispotential.C.theauthorexhibitedenoughscholarshipinhisLatinproseandotherways.D.theauthorwasgrantedanawardfromDr.Welldon.72.TheauthorhasalwayshadthegreatestregardforDr.WelldonbecauseA.Dr.WelldonallowedhimtoenterHarrowduetohisgoodperformanceintheexams.B.Dr.WelldonwastheheadmasterofHarrow.C.Dr.Welldonappreciatedthewayhecopedwiththeexam.D.DrWelldonwasamanofinsight.73.Accordingtothepassage,whichofthefollowingstatementsisNOTtrue?A.Theauthorhadadifficulttimeinexamswhenhewastwelveyearsold.B.Theauthorusedtobeatimidboysothathedidpoorlyinexaminations.C.Theauthorwasgoodathistory,poetryandwritingessays,butnotatLatinandmathematics.D.Theauthor'sgeneralabilitywasdetectedbyDr.Welldonthoughhedidnotdowellintheentrancexaminations.(5)Grasseswerenotalwaysthedominantplantforminagrassprairie.DuringmuchofthePaleozoicandMesozoiceras(570to70millionyearsago).SouthDakota(astateofthenorth-centralUnitedStates)waspartofavasttropicallowland.Formostofthistimeperiod,shallowseascoveredtheinterioroftheUnitedStates.ThelasttimemostoftheGreatPlainsregionwasunderwaterwasabout809to65millionyearsago.ThegradualupliftoftheRockyMountainshadaprofoundeffectontheclimate.ofthisregion.Everythingwaschangedandaffected.TheBlackHillsregionupliftedasa.singledomemountain.Asthelandemerged,lushtropicalvegetationspreadacrosstheregion.WiththeupliftoftheRockyMountains,thewarm,moistairfromthePacificOceanthatoncereachedthecentralplainswasnowinterceptedbythemountainsandcooled.Astheaircontinuedtocool,watervaporcondensed,causingmoisturetofallwestofthemountains.Theregioneastofthemountains,onceatropicalforest,receivedlesswater.Itbecamemoredry.Thearidlandwasnolongerabletosupportthevast,lushforests.ThePleistoceneepochwasmarkedbymajorglacialepisodesandacold,dryclimate.AlthoughglaciersnevercoveredwesternSouthDakota,thecontinentalicesheetcamewithin150milesoftheBlackHills;coolingthisregion.Thischangeinclimateledtothepresenceofmanynewplantcommunities.Neartheicesheet'sedge,thevegetationtypewasmostlikelyarctictundradominatedbylichens,mosses,anddwarfwillows.Glacialadvancesalternatedwithperiodsofretreat.Duringtheseperiods,plantspeciesfromthesouthernregionsmovednorthward.Plantsthatwereonceuniquetoaregionnowarefoundinotherareasoftheland.Regionsthatoncehadonlyafewtypesofplantsnowhaveagreatbiodiversity.Thebiodiversityseentodayoccurredbecauseofthistransferenceofplantspecies.74.Whatdoesthepassagemainlydiscuss?A.ThetypesofplantsandgrassesfoundinSouthDakotatoday.B.ThereasonswhytheweatherchangedinhistoryinSouthDakota.C.HowpeoplelivedinSouthDakotaduringtheIceAge.D.HowdifferentplantsandvegetationdevelopedovertheyearsinSouthDakota.75.WhichofthefollowingisNOTdiscussedinthefirstparagraph?A.WhatSouthDakotawaslikeduringthePaleozoicera.B.WhenSouthDakotawaspartofatropicallowland.C.Whenpeoplefirstbeganliv