2020年大学英语四级考试真题及答案

精品欢迎下载可修改大学英语四级考试真题及答案（第一套）PartIWriting（25minutes）Directions:Forthispart,youareallowed30minutestowriteashorteasyonhowtobesthandletherelationshipbetweendoctorsandpatients.Youshouldwriteatleast120wordsbutnomorethan180words.PartIIListeningComprehension（25minutes）SectionADirections:Inthissection,youwillhearthreenewsreports.Attheendofeachnewsreport,youwillheartwoorthreequestions.Boththenewsreportandthequestionswillbespokenonlyonce.Afteryouhearaquestion,youmustchoosethebestanswerfromthefourchoicesmarkedA),B),C)andD).ThenmarkthecorrespondingletteronAnswerSheet1withasinglelinethroughthecentre.Questions1and2arebasedonthenewsreportyouhavejustheard.1.A)HerfriendErika.C)Hergrandfather.B)Herlittlebrother.D)Hergrandmother.2.A)Bytakingpicturesforpassers-by.C)Bysellinglemonadeandpictures.B)Byworkingparttimeatahospital.D)Byaskingforhelponsocialmedia.Questions3and4arebasedonthenewsreportyouhavejustheard.3.A)Findingcheaperwaysofhighwayconstruction.B)Generatingelectricpowerforpassingvehicles.C)Providingcleanenergytofivemillionpeople.精品欢迎下载可修改D)Testingtheefficiencyofthenewsolarpanel.4.A)Theycanstandthewearandtearofnaturalelements.B)Theycanbelaidrightontopofexistinghighways.C)Theyareonlyabouthalfaninchthick.D)Theyaremadefromcheapmaterials.Questions5to7arebasedonthenewsreportyouhavejustheard.5.A)Endlessfightingintheregion.C)Inadequatefundingforresearch.B)Thehazardsfromthedesert.D)Thelackofcluesaboutthespecies.6.A)Toobservethewildlifeinthetwonationalparks.B)Toidentifythereasonsforthelions’disappearance.C)TostudythehabitatoflionsinSudanandEthiopia.D)Tofindevidenceoftheexistenceofthe“lostlions”.7.A)Lionswalking.C)Somecampingfacilities.B)Lions’racks.D)Trapssetbylocalhunters.SectionBDirections：Inthissection,youwillheartwolongconversations.Attheendofeachconversation,youwillhearfourquestions.Boththeconversationandthequestionswillbespokenonlyonce.Afteryouhearaquestion,youmustchoosethebestanswerfromthefourchoicesmarkedA),B),C),andD).ThenmarkthecorrespondingletteronAnswerSheet1withasinglelinethroughthecentre.Questions8to11arebasedontheconversationyouhavejustheard.8.A)Her‘luckybirthday’.C)Herweddinganniversary.精品欢迎下载可修改B)Acallfromherdad.D)Aspecialgiftfromtheman.9.A)Gaveherabigmodelplane.C)Tookheronatripoverseas.B)Boughtheragoodnecklace.D)Threwherasurpriseparty.10.A)Thegiftherhusbandhasbought.B)Thetripherhusbandhasplanned.C)Whathasbeentroublingherhusband.D)Whatherhusbandandthemanareupto.11.A)Hewillbegladtobeaguideforthecouple’sholidaytrip.B)Hewilltellthewomenthesecretifherhusbandagrees.C)Heiseagertolearnhowthecouple’sholidayturnsout.D)Hewantstofindoutaboutthecouple’sholidayplan.Questions12to15arebasedontheconversationyouhavejustheard.12.A)Theyaresensitivetothedynamicsofanegotiation.B)Theyseetheimportanceofmakingcompromises.C)Theyknowwhentoadoptatoughattitude.D)Theytaketherival’sattitudeintoaccount.13.A)Theyknowhowtoadapt.C)Theyknowwhentomakecompromises.B)Theyknowwhentostop.D)Theyknowhowtocontroltheiremotion.14.A)Theyarepatient.C)Theylearnquickly.B)Theyaregoodatexpression.D)Theyupholdtheirprinciples.精品欢迎下载可修改15.A)Makeclearone'sintentions.C)Formulateone'sstrategy.B)Clarifyitemsofnegotiation.D)Gettoknowtheotherside.SectionCDirections:Inthissection,youwillhearthreepassages.Attheendofeachpassage,youwillhearthreeorfourquestions.Boththepassageandthequestionswillbespokenonlyonce.Afteryouhearaquestion,youmustchoosethebestanswerfromthefourchoicesmarkedA),B),C),D).ThenmarkthecorrespondingletteronAnswerSheet1withasinglelinethroughthecentre.Questions16to18arebasedonthepassageyouhavejustheard.16.A)WhenAmerica'searliestspaceprogramstarted.B)WhentheInternationalSpaceStationwasbuilt.C)Howmanyspaceshuttlemissionstherewillbe.D)HowspaceresearchbenefitspeopleonEarth.17.A)Theyaccuratelycalculatedthespeedoftheorbitingshuttles.B)Theydevelopedobjectsforastronautstouseinouterspace.C)Theytriedtomeetastronauts'specificrequirements.D)Theytriedtomakebestuseofthelatesttechnology.18.A)Theyareextremelyaccurate.C)Theywerefirstmadeinspace.B)Theyareexpensivetomake.D)Theywereinventedinthe1970s.精品欢迎下载可修改Questions19to21arebasedonthepassageyouhavejustheard.19.A)ItwaswhenherancestorscametoAmerica.B)Peoplehadplentyoflandtocultivatethen.C)Itmarkedthebeginningofsomethingnew.D)Everythingwasnaturalandgenuinethen.20.A)Theybelievedinworkingforgoals.C)Theyhadallkindsofentertainment.B)Theyenjoyedlivingalivingalifeofease.D)Theywereknowntobecreative.21.A)Chattingwithherancestors.C)Polishingallthesilverwork.B)Furnishinghercountryhouse.D)Doingneedleworkbythefire.Questions22to25arebasedonthepassageyouhavejustheard.22.A)Useamaptoidentifyyourlocation.C)Sitdownandtrytocalmyourself.B)Callyourfamilyorfriendsforhelp.D)Trytofollowyourfootprintsback.23.A)Youmayfindawayoutwithoutyourknowingit.B)Youmayexposeyourselftounexpecteddangers.C)Youmaygetdrownedinasuddenflood.D)Youmayendupenteringawonderland.24.A)Lookforfood.C)Startafire.B)Waitpatiently.D)Walkuphill.25.A)Informsomebodyofyourplan.C)Checkthelocalweather.精品欢迎下载可修改B)Prepareenoughfoodanddrink.D)Findamapandacompass.PartⅢReadingComprehension(40minutes)SectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Aratorpigeonmightnotbetheobviouschoicetotendtosomeonewhoissick,butthesecreatureshavesome26skillsthatcouldhelpthetreatmentofhumandiseases.Pigeonsareoftenseenasdirtybirdsandanurban27,buttheyarejustthelatestinalonglineofanimalsthathavebeenfoundtohaveabilitiestohelphumans.Despitehavingabrainnobiggerthanthe28ofyourindexfinger,pigeonshaveaveryimpressive29__memory.Recentlyitwasshownthattheycouldbetrainedtobeasaccurateashumansatdetectingbreastcancerinimages.Ratsareoften30withspreadingdiseaseratherthan31it,butthislong-tailedanimalishighly32.Insidearat'snoseareupto1,000differenttypesofolfactoryreceptors（嗅觉感受器）,whereashumansonlyhave100to200types.Thisgivesratstheabilitytodetect__33smells.Asaresult,someratsarebeingputtoworktodetectTB（肺结核）.Whentheratsdetectthesmell,theystopandrubtheirlegsto34asampleisinfected.Traditionally,ahundredsampleswouldtakelabtechniciansmorethantwodaysto35,butforaratittakeslessthan20minutes.Thisratdetectionmethoddoesn'trelyonspecialistequipment.Itisalsomoreaccurate—theratsareabletofindmoreTBinfectionsand,therefore,savemorelives.A)associatedI)slightB)examineJ)specify精品欢迎下载可修改C)indicateK)superiorD)nuisanceL)suspiciousE)peakM)tipF)preventingN)treatedG)prohibitingO)visualH)sensitiveSectionBDirections:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmaychooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.AnswerthequestionsbymarkingthecorrespondingletteronAnswerSheet2.DoIn-ClassExamsMakeStudentsStudyHarder?Researchsuggeststheymaystudymorebroadlyfortheunexpectedratherthansearchforanswers.[A]Ihavealwaysbeenapoortest-taker.SoitmayseemratherstrangethatIhavereturnedtocollegetofinishthedegreeIleftundonesomefourdecadesago.IammakingmywaythroughColumbiaUniversity,surroundedbystudentswhoquicklysupplytheverbalanswerwhileIamstillprocessingthequestion.[B]Sincethereisnowayformetoavoidexams,Iamcurrentlyquestioningwhatkindarethemosttaxingandultimatelybeneficial.Ihavealreadysweatedthroughnumerousin-classmidtermsandfinals,andnowIhaveaprofessorwhoissuestake-homeones.IwasexcitedwhenIlearnedthis,figuringIhadafullweektodotheresearch,readthetexts,andwriteitallup.Infact,Iwasstillrewritingmymidtermthemorningitwasdue.TosayIhadlostthethreadisputtingitmildly.精品欢迎下载可修改[C]AsIwassufferingthroughmyweekofanxiety,overthinkingthematerialandguessingmygraspofit,Ididsomeofmyownpollingamongstudentsandprofessors.DavidEisenbach,whoteachesapopularclassonU.S.presidentsatColumbia,prefersthein-classvariety.Hebelievesstudentsultimatelylearnmoreandencouragesthemtoformstudygroups.“Thatwaytheysocializeoverhistoryoutsidetheclass,whichwouldn’thappenwithoutthepressureofanin-classexam,”heexplained,“Furthermore,in-classexamsforcestudentstolearnhowtoperformunderpressure,andessentialworkskill.”[D]Healsosaysthereislesschanceofcheatingwiththein-classvariety.In2012,125studentsatHarvardwerecaughtupinascandalwhenitwasdiscoveredtheyhadcheatedonatake-homeexamforaclassentitled“IntroductionToCongress.”Somecollegeshavewhattheycallan“honorcode,”thoughifyouaresmartenoughtogetintotheseschools,youareeithersmartenoughtogetaroundanycodesorhopefully,tooethicaltoconsiderdoingso.AsIsatblockedandcluelessfortwosoliddays,ImomentarilywonderedifIcouldn’tjustcallanexpertonthesubjectmatterwhichIwastackling,orsomeonewhotooktheclasspreviously,togetmegoing.[E]FollowingtheHarvardscandal,MaryMiller,theformerdeanofstudentsatYale,madeanimpassionedappealtoherschool’sprofessorstorefrainfromhoneexams.“Studentsriskhealthandwellbeing,aswellasperformanceinotherend-of-termwork,whenfacultyofferstake-homeexamswithoutclear,time-limitedboundaries,”shetoldme.“Researchnowshowsthatregularquizzes,shortessays,andotherassignmentsoverthecourseofatermbetterenhancelearningandretention.”[F]Mostcollegeprofessorsagreethekindofexamtheychooselargelydependsonthesubject.Aquantitative-basedone,forexample,isunlikelytobesenthome,whereonecouldasktheirolderbrothersandsisterstohelp.Vocational-typeclasses,suchascomputerscienceorjournalism,ontheotherhand,areoftenmoreresearch-orientedandlendthemselvestotake-hometesting.ChrisKoch,whoteaches“HistoryofBroadcastJournalism”atMontgomeryCommunityCollegeinRockville,Maryland,pointsoutthatreportingisaboutinvestigationratherthanthememorizationofminutedetails.“Inmyfield,it’snotwhatyouknow—it’swhatyouknowhowtofindout,”saysKoch.“Thereiswaytoomuchinformation,andmore精品欢迎下载可修改comingallthetime,foranyonetoremember.Iwantmystudentstosearchouttheanswerstoquestionsbyusingalltheresourcesavailabletothem.[G]Students’test-formpreferencesvary,too,oftendependingonthesubjectandcoursedifficulty.“Iprefertake-homeessaysbecauseitisthenreallyaboutthewriting,soyouhavetimetoeditanddomoreresearch,”saysElizabethDresser,ajunioratBarnard.Thenthereisthestressfactor.FrancescaHaass,asenioratMiddlebury,says,“Ifindthe-classonesaremorestressfulintheshortterm,butthereisimmediatereliefasyouswallowinformationlikemad,andthenyougettoforgetitall.Take-homesrequirethoughtfulengagementwhichcanleadtolongertermstressasthereisneveramomentwhenthetimeisup.”Meanwhile,OliviaRubin,asophomoreatEmory,saysshehardlyevenconsidershomestrueexams.“Ifyouunderstandthematerialandhavetheabilitytoarticulate说出)yourthoughts,theyshouldbeabreeze.”[H]Howstudentsultimatelyhandlestressmaydependontheirpersonaltest-takingabilities.Therearepeoplewhoalwayswaituntilthelastminute,andmakeitmuchharderthanitneedstobe.Andthentherethosewho,notknowingwhatquestionsarecomingatthem,andhavingnoresourcestoreferto,canfreeze.Andthentherearewerarefolkswhofitboththosedescriptions.[I]Yes,myadvancedagemustfactorintotheequation等式),inpartbecauseofmyinabilitytoaccesstheinformationasquickly.AsanotherreturningstudentatColumbia,KateMarber,toldme,“Wearelearningnotonlyallthisinformation,butessentiallyhowtolearnagain.Ourfellowstudentshavejustcomeoutofhighschool.Alothaschangedsincewewerelastinschool.”[J]Ifnothingelse,thesituationhasgivenmycollegesonandmesomethingtoshare,WhenI精品欢迎下载可修改askedhisopiniononthismatter,heresponded,“Ilikein-classexamsbecausethetimeisalreadyreserved,asopposedousingmyfreetimeathometoworkonatest,”heresponded.Itseemstomethatacompromisewouldbereceivingtheexamquestionsadayortwoinadvance,andthendoingtheactualtestinclassthetickingclockoverhead.[K]Betteryet,howaboutwhatoneHunterCollegeprofessorreportedlydidrecentlyforherfinalexam:Sheencouragedtheclassnottostressorevenstudy,promisingthat,“Itisgoingtobeapieceofcake.”Whenthestudentscamein,sharpenedpencilsinhand,therewasnotabluebookinsight.Rather,theysawalargechocolatecakeandtheyeachweregivenaslice.36.Elderlystudentsfindithardtokeepupwiththerapidchangesineducation.37.Somebelievetake-homeexamsmayaffectstudents'performanceinothercourses.38.Certainprofessorsbelievein-classexamsareultimatelymorehelpfultostudents.39.In-classexamsarebelievedtodiscouragecheatinginexams.40.Theauthorwashappytolearnshecoulddosomeexamsathome.41.Studentswhoputofftheirworkuntilthelastmomentoftenfindtheexamsmoredifficultthantheyactuallyare.精品欢迎下载可修改42.Differentstudentsmaypreferdifferenttypesofexams.43.Mostprofessorsagreewhethertogiveanin-classoratake-homeexamdependsontypeofcoursebeingtaught.44.Theauthordroppedoutofcollegesomefortyyearsago.45.Somestudentsthinktake-homeexamswilleatuptheirfreetime.SectionCDirections:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletteronAnswerSheet2withasinglelinethroughthecentre.PassageOneQuestions46and50arebasedonthefollowingpassage.Thatpeopleoftenexperiencetroublesleepinginadifferentbedinunfamiliarsurroundingsisaphenomenonknownasthe“firstnight”effect.Ifapersonstaysinthesameroomthefollowingnighttheytendtosleepmoresoundly.YukaSasakiandhercolleaguesatBrownUniversitysetouttoinvestigatetheoriginsofthiseffect.Dr.Sasakiknewthefirst-nighteffectprobablyhassomethingtodowithhowhumansevolved.Thepuzzlewaswhatbenefitwouldbegainedfromitwhenperformancemightbeaffectedthefollowingday.Shealsoknewfrompreviousworkconductedonbirdsanddolphinsthattheseanimalsputhalfoftheirbrainstosleepatatimesothattheycanrestwhileremainingalertenoughtoavoidpredators(捕食者).Thisledhertowonderifpeoplemightbedoingthesamething.Totakeacloserlook,herteamstudied35healthypeopleastheysleptintheunfamiliarenvironmentoftheuniversity’sDepartmentofPsychologicalSciences.Theparticipantseachsleptinthedepartmentfortwonightsandwerecarefullymonitoredwithtechniquesthatlookedattheactivityoftheirbrains.Dr.Sasakifound,asexpected,theparticipantssleptlesswellontheirfirstnightthantheydidontheirsecond,takingmorethantwiceaslong精品欢迎下载可修改tofallasleepandsleepinglessoverall.Duringdeepsleep,theparticipants’brainsbehavedinasimilarmannerseeninbirdsanddolphins.Onthefirstnightonly,thelefthemispheres半球)oftheirbrainsdidnotsleepnearlyasdeeplyastheirrighthemispheresdid.Curiousifthelefthemisphereswereindeedremainingawaketoprocessinformationdetectedinthesurroundingenvironment,Dr.Sasakire-rantheexperimentwhilepresentingthesleepingparticipantswithamixofregularlytimedbeeps蜂鸣声)ofthesametoneandirregularbeepsofadifferenttoneduringthenight.Sheworkedoutthat,ifthelefthemispherewasstayingalerttokeepguardinastrangeenvironment,thenitwouldreacttotheirregularbeepsbystirringpeoplefromsleepandwouldignoretheregularlytimedones.Thisispreciselywhatshefound.46.Whatdidresearchersfindpuzzlingaboutthefirst-nighteffect?A)Towhatextentitcantroublepeople.C)Whatcircumstancesmaytriggerit.B)Whatroleithasplayedinevolution.D)Inwhatwayitcanbebeneficial.47.WhatdowelearnaboutDr.YukaSasakidoingherresearch?A)Shefoundbirdsanddolphinsremainalertwhileasleep.B)Shefoundbirdsanddolphinssleepinmuchthesameway.C)ShegotsomeideafrompreviousstudiesonbirdsanddolphinsD)Sheconductedstudiesonbirds’anddolphins’sleepingpatterns.48.WhatdidDr.Sasakidowhenshefirstdidherexperiment?A)Shemonitoredthebrainactivityofparticipantssleepinginanewenvironment.B)Sherecruited35participantsfromherDepartmentofPsychologicalSciences.C)Shestudiedthedifferencesbetweenthetwosidesofparticipants’brains.D)Shetestedherfindingsaboutbirdsanddolphinsonhumansubjects.精品欢迎下载可修改49.WhatdidDr.Sasakidowhenre-runningherexperiment?A)Sheanalyzedthenegativeeffectofirregulartonesonbrains.B)Sherecordedparticipants’adaptationtochangedenvironment.C)Sheexposedherparticipantstotwodifferentstimuli.D)Shecomparedtheresponsesofdifferentparticipants.50.WhatdidDr.Sasakifindabouttheparticipantsinherexperiment?A)Theytendedtoenjoycertaintonesmorethanothers.B)Theytendedtoperceiveirregularbeepsasathreat.C)Theyfeltsleepywhenexposedtoregularbeeps.D)Theydifferedintheirtoleranceofirregulartones.PassageTwoQuestions51to55arebasedonthefollowingpassage.It’stimetoreevaluatehowwomenhandleconflictatwork.Beingoverworkedorover-committedathomeandonthejobwillnotgetyouwhereyouwanttobeinlife.Itwillonlyslowyoudownandhinderyourcareergoals.Didyouknowwomenaremorelikelythanmentofeelexhausted?Nearlytwiceasmanywomenthanmenages44reportedfeeling“verytired”or“exhausted”,accordingtoarecentstudy.Thismaynotbesurprisinggiventhatthisistheagerangewhenwomenhavechildren.It'salsotheagerangewhenmanywomenaretryingtobalancecareersandhome.Onereasonwomenmayfeelexhaustedisthattheyhaveahardtimesaying"no."Womenwanttobeabletodoitallvolunteerforschoolpartiesorcookdeliciousmeals-andsotheiranswertoanyrequestisoften“Yes,Ican.”精品欢迎下载可修改Womenstruggletosay“no”intheworkplaceforsimilarreasons,includingthedesiretobelikedbytheircolleagues.Unfortunately,thisinabilitytosay"no"maybehurtingwomen'sheathaswellastheircareer.Attheworkplace,menuseconflictasawaytopositionthemselves,whilewomenoftenavoidconflictorstrivetobethepeacemaker,becausetheydon'twanttobeviewedasaggressiveordisruptiveatwork.Forexample,there’saproblemthatneedstobeaddressedimmediately,resultinginadisputeovershouldbetheonetofixit.Menaremorelikelytofacethatdisputefromtheperspectiveofwhatbenefitsthemmost,whereaswomenmayapproachthesamedisputefromtheperspectiveofwhat'stheeasiestandquickestwaytoresolvetheproblem-evenifthatmeansdoingtheboringworkthemselves.Thisdifference