2017年6月大学英语六级考试真题及答案解析（共三套完整版）

2017年6⽉⼤学英语六级考试真题及答案解析（共三套完整版）

给四六级考⽣们送福利啦！2017年6⽉⼤学英语六级考试真题及答案解析（第三套完整版）已整理好，由外语教育⽹校

教务⽼师精⼼解析汇总，希望对即将参加考试的考⽣备考有多多帮助。

PartIWriting(30minutes)

Directions:Supposeyouareaskedtogiveadviceonwhethertoattendcollegeathomeorabroad,writeanessayto

stateyouropinion.Youarerequiredtowriteatleast150wordsbutnomorethan200words.

【参考范⽂】

WhethertoAttendCollegeatHomeorAbroad?

Currently,withstudyingabroadgainsmountingpopularityamongpeople,thereisaheateddebateaboutwhetherto

attendcollegeathomeorabroad.Opinionsonthistopicvaryfrompersontoperson.Someseemorebenefitsin

studyingathomewhileothersclaimthatstudyingabroadisamoreidealchoiceasit'smorechallenging.

Personally,Iamastrongfavorerofthelatterview.Listedbelowarethereasonsformyadvice.Firstofall,attending

collegeabroadprovidesanopportunitytobroadenone'sexperienceandmind.Youcanacquirecross-cultural

experiencesandgainnewperspectivesonyourchosenfieldofstudy.Inaddition,studyingabroadhelpsyoutopolish

yoursocialskills;youcanmakefriendswithdifferentpeoplewithdifferentbackground.Thirdly,overseasstudyingis

conducivetotheformationofanindependent,autonomousandtenaciouspersonality,whichwillultimatelybenefitthe

achievementofourlifegoals.

Justasanoldsayinggoes:"Itisbettertotravelthousandmilesthantoreadtenthousandbooks."Thenstudying

abroadcannotonlyenableustoreapinourbooks,butalsoinourtrips.Andthisiswhyattendingcollegeabroadisa

preferableselectionforme.

PartIIListeningComprehension

说明：2017年6⽉⼤学英语六级真题全国共考了两套听⼒。本套（即第三套）的听⼒材料与第⼀套完全⼀样，只是选项

的顺序不同⽽已，故本套不再重复给出。

PartIIIReadingComprehension(40minutes)

SectionA

Directions:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfrom

alistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyour

choices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswer

Sheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.

Halfofyourbrainstaysalertandpreparedfordangerwhenyousleepinanewplace,astudyhasrevealed.This

phenomenonisoften__26__toasthe"first-night-effect".ResearchersfromBrownUniversityfoundthatanetworkin

thelefthemisphereofthebrain"remainedmoreactive"thanthenetworkintherightsideofthebrain.Playingsounds

intotherightears(stimulatingthelefthemisphere)of__27__wasmorelikelytowakethemupthanifthenoiseswere

playedintotheirleftear.

Itwas__28__observedthattheleftsideofthebrainwasmoreactiveduringdeepsleep.Whentheresearchers

repeatedthelaboratoryexperimentonthesecondandthirdnightstheyfoundthelefthemispherecouldnotbe

stimulatedinthesamewayduringdeepsleep.Theresearchersexplainedthatthestudydemonstratedwhenwearein

a__29__environmentthebrainpartlyremainsalertsothathumanscandefendthemselvesagainstany__30__

danger.

Theresearchersbelievethisisthefirsttimethatthe"first-night-effect"ofdifferentbrainstateshasbeen__31__in

humans.Itisn't,however,thefirsttimeithaseverbeenseen.Someanimal__32__alsodisplaythisphenomenon.For

humans.Itisn't,however,thefirsttimeithaseverbeenseen.Someanimal__32__alsodisplaythisphenomenon.For

example,dolphins,aswellasother__33__animals,shutdownonehemisphereofthebrainwhentheygotosleep.A

previousstudynotedthatdolphinsalways__34__controltheirbreathing.Withoutkeepingthebrainactivewhile

sleeping,theywouldprobablydrown.But,asthehumanstudysuggest,anotherreasonfordolphinskeepingtheireyes

openduringsleepisthattheycanlookoutfor__35__whileasleep.Italsokeepstheirphysiologicalprocesses

working.

A)classifiedB)consciouslyC)dramaticallyD)exoticE)identified

F)inherentG)marineH)novelI)potentialJ)predators

K)referredL)speciesM)specificallyN)varietiesO)volunteers

26.【解析】K。空格前是系动词is和副词often，空格后是不定式to，所以此空应该填⼊⼀个形容词或者动词的-ed形式。

选项referred符合句意。bereferredtoas为固定搭配，意为"被称为"。故选K。

27.【解析】O。空格前是名词词组therightears和介词of，空格后是系动词was，所以此空应该填⼊⼀个表⽰⼈的名

词，表⽰所属关系。选项volunteers符合句意。故选O。

28.【解析】M。空格前是系动词was，空格后是动词的-ed形式observed，所以此空应该填⼊⼀个副词，修饰

observed。选项specifically

符合。故选M。

29.【解析】H。空格前是不定冠词a；空格后是名词environment，所以此空应该填⼊⼀个形容词。选项novel符合句

意。故选H。

30.【解析】I。空格前是代词any，空格后是名词danger，所以此空应该填⼊⼀个形容词。选项potential符合句意。故

选I。

31.【解析】E。空格前是现在完成时的标志词hasbeen，空格后是介词词组inhumans，所以此空应该填⼊⼀个动词

的-ed形式。选项identified符合句意。故选E。

32.【解析】L。空格前是名词animal，空格后是副词also和动词display,谓语和宾语完整，所以此空应该填⼊⼀个名词，

与someanimal构成名词词组，作主语。选项species符合句意。故选L。

33.【解析】G。空格前是代词other，空格后是名词animals，所以此空应该填⼊⼀个形容词。选项marine符合句意。故

选G。

34.【解析】B。空格前是宾语从句的主语dolphins和副词always，空格后是谓语动词control，所以此空应该填⼊⼀个副

词，修饰control。

选项consciously符合句意。故选B。

35.【解析】J。空格前是谓语动词lookoutfor，空格后是时间状语从句whileasleep，所以此空应该填⼊⼀个名词，作

表语从句的谓语。

选项predators符合句意。故选J。

SectionB

Directions:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontains

informationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmay

chooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.Answerthequestionsbymarkingthe

correspondingletteronAnswerSheet2.

EliteMathCompetitionsStruggletoDiversifyTheirTalentPool

EliteMathCompetitionsStruggletoDiversifyTheirTalentPool

[A]Interestinelitehighschoolmathcompetitionshasgrowninrecentyears,andinlightoflastsummer'sU.S.winat

theInternationalMathOlympiad(IMO)---thefirstforanAmericanteaminmorethantwodecades—thetrendislikelyto

continue.

[B]Butwillsuchcontests,whichareoverwhelminglydominatedbyAsianandwhitestudentsfrommiddle-classand

affluentfamilies,becomeanymorediverse?Manysocialandculturalfactorsplayrolesindeterminingwhichpromising

studentsgetonthepathtowardinternationalmathrecognition.Buteffortsareinplacetoexposemoreblack,Hispanic,

andlow-incomestudentstoadvancedmath,inthehopethatthedemographicpoolofhigh-levelcontenderswill

eventuallybegintoshiftandbecomelessexclusive.

[C]"Thechallengeisifcertaintypesofpeoplearedoingsomething,it'sdifficultforotherpeopletobreakintoit,"said

Po-ShenLoh,theheadcoachoflastyear'swinningU.S.MathOlympiadteam.Participationgrowsthroughfriendsand

networksandif"yourealizethat'showthey'regrowing,youcanstarttotakeaction"andbringinotherstudents,he

said.

[D]Mostofthetrainingforadvanced-mathcompetitionshappensoutsidetheconfinesofthenormalschoolday.

Studentsattendafter-schoolclubs,summercamps,onlineforumsandclasses,anduniversity-based"mathcircles",to

prepareforthecompetitions.

[E]Oneofthelargestfeedersforhighschoolmathcompetitions—includingthosethateventuallyleadtotheIMO—isa

middleschoolprogramcalledMathCounts.About100,000studentsaroundthecountryparticipateintheprogram's

competitionseries,whichculminatesinanationalgame-show-stylecontestheldeachMay.Themostrecentonetook

placelastweekinWashington,D.C.Studentsjoinateamthroughtheirschools,whichprovideavolunteercoachand

payanominalfeetosendstudentstoregionalandstatecompetitions.The224studentswhomakeittothenational

competitiongetanall-expenses-paidtrip.

[F]Nearlyallmembersoflastyear'swinningU.S.IMOteamtookpartinMathCountsasmiddleschoolstudents,asdid

Loh,thecoach."Middleschoolisanimportantagebecausestudentshaveenoughmathcapabilitytosolveadvanced

problems,buttheyhaven'treallydecidedwhattheywanttodowiththeirlives,"saidLoh."Theyoftengethookedthen."

[G]Anotherinfluentialfeederforadvanced-mathstudentsisanonlineschoolcalledArtofProblemSolving,which

beganabout13yearsagoandnowhas15,000users.Studentsuseforumstochat,playgames,andsolveproblems

togetheratnocost,ortheycanpayafewhundreddollarstotakecourseswithtrainedteachers.AccordingtoRichard

Rusczyk,thecompanyfounder,thesixU.S.teammemberswhocompetedattheIMOlastyearcollectivelytookmore

than40coursesonthesite.Parentsofadvanced-mathstudentsandMathCountscoachessaythechildrenareonthe

websiteconstantly.

[H]Therearealsodozensofsummercamps—manyattachedtouniversities—thataimtoprepareelitemathstudents.

Somearepricey---athree-weekintensiveprogramcancost$4,500ormore—butmostofferscholarships.TheMath

OlympiadSummerTrainingProgramisathree-weekmathcampheldbytheMathematicalAssociationofAmericathat

leadsstraighttotheinternationalchampionshipandisfreeforthosewhomakeit.Onlyabout50studentsareinvited

basedontheirperformanceonwrittentestsandattheUSAMathOlympiad.

[I]Studentsinuniversitytownsmayalsohaveaccesstoanotherleverforinvolvementinacceleratedmath:math

circles.Inthesegroups,whichcameoutofanEasternEuropeantraditionofdevelopingyoungtalent,professorsteach

promisingK-12studentsadvancedmathematicsforseveralhoursafterschooloronweekends.TheLosAngelesMath

Circle,heldattheUniversityofCalifornia,LosAngeles,beganin2007with20studentsandnowhasmorethan250.

"Thesemathcirclescostnothing,orthey'reverycheapforstudentstogetinvolvedin,butyouhavetoknowabout

them,"saidRusczyk."Mostpeoplewouldlovetogetstudentsfrommoreunderservedpopulations,buttheyjustcan't

gettheminthedoor.Partofitiscommunication;partofitistransportation."

[J]It'snosecretintheadvanced-mathcommunitythatdiversityisaproblem.AccordingtoMarkSaul,thedirectorof

competitionsfortheMathematicalAssociationofAmerica,notasingleAfrican-AmericanorHispanicstudent---and

onlyahandfulofgirls---hasevermadeittotheMathOlympiadteaminits50yearsofexistence.Manyschoolssimply

don'tprioritizeacademiccompetitions."Doyouknowwhowehavetobeat?"askedSaul."Thefootballteam,the

basketballteam---that'sourcompetitionforresources,studenttime,attention,schooldollars,parentefforts,school

enthusiasm."

[K]Teachersinlow-incomeurbanandruralareaswithnohistoryofparticipatinginmathcompetitionsmaynotknow

aboutadvanced-mathopportunitieslikeMathCounts—andthosewhodomaynothavesupportorfeeltrainedtolead

them.

[L]Butthereareinitiativesinplacetotrytogetmoreunderrepresentedstudentsinvolvedinacceleratedmath.ANew

YorkCity-basednonprofitcalledBridgetoEnterMathematicsrunsaresidentialsummerprogramaimedatgetting

underservedstudents，mostlyblackandHispanic,workingtowardmathandsciencecareers.Thesummerafter7th

grade,studentsspendthreeweeksonacollegecampusstudyingadvancedmathforsevenhoursaday.Overthenext

fiveyears,thegrouphelpsthestudentsgetintootherelitesummermathprograms,high-performinghighschools,and

eventuallycollege.About250studentssofarhavegonethroughtheprogram,whichreceivesfundingfromtheJack

KentCookeFoundation.

[M]"Ifyoulookatalotoflow-incomecommunitiesintheUnitedStates,thereareprogramsthatareservingthem,but

they'reprimarilycenteredaround'Let'sgetthesekids'gradesup',andnotaround'Let'sgetthesekidsaccesstothe

samekindsofopportunitiesasmore-affluentkids,'"saidDanielZaharopol,thefounderandexecutivedirectorofthe

program."We'retryingtocreatethatpathway."Studentsapplytotheprogramdirectlythroughtheirschools."Wewant

toreachparentswhoarenotpluggedintothesystem,"saidZaharopol.

[N]Inthepastfewyears,MathCountsaddedtwonewmiddleschoolprogramstotrytodiversifyitsparticipantpool---

theNationalMathClubandtheMathVideoChallenge.SchoolsorteacherswhosignupfortheNationalMathClub

receiveakitfullofactivitiesandresources,butthere'snospecialteachertrainingandnocompetitionattached.

[O]TheMathVideoChallengeisacompetition,butacollaborativeone.Teamsoffourstudentsmakeavideo

illustratingamathproblemanditsreal-worldapplication.Afterthehigh-pressureCountdownroundatthisyear's

nationalMathCountscompetition,inwhichthetop12studentswentheadtoheadsolvingcomplexproblemsinrapid

fire,thefinalistsfortheMathVideoChallengetookthestagetoshowtheirvideos.Thedemographicsofthatgroup

lookedquitedifferentfromthoseinthecompetitionround---ofthe16videofinalists,13weregirlsandeightwere

African-Americanstudents.Thevideochallengedoesnotputindividualstudentsonthehotseat---soit'sless

intimidatingbydesign.Italsoaddstheelementofartisticcreativitytoattractanewpoolofstudentswhomaynotsee

themselvesas"mathpeople".

36.Middleschoolisacrucialperiodwhenstudentsmaybecomekeenlyinterestedinadvancedmathematics.

36.【解析】F。根据题⼲中的关键词middleschool,crucialperiod,keenlyinterestedin可定位⾄原⽂的F)段。

37.ElitehighschoolmathcompetitionsareattractingmoreinterestthroughouttheUnitedStates.

37.【解析】A根据题⼲中的关鍵词elitehighschoolmathcompetitions,moreinterest可定位⾄A)段。

38.Mathcirclesprovidestudentswithaccesstoadvanced-mathtrainingbyuniversityprofessors.

38.【解析】I。根据题⼲中的关键词mathcircles,professors可定位⾄I)段。

39.Studentsmaytakeadvantageofonlineresourcestolearntosolvemathproblems.

39.【解析】G。根据题⼲中的关键词onlineresources和solvemathproblems可定位⾄G)段前两句。

40.Thesummerprogramrunbyanonprofitorganizationhashelpedmanyunderservedstudentslearnadvanced

math.

40.【解析】L。根据题⼲中的关键词nonprofitorganization,underservedstudents可定位⾄L)段。

41.Winnersoflocalcontestswillparticipateinthenationalmathcompetitionforfree.

41.【解析】E。根据题⼲中的关键词nationalmathcompetition,free可定位⾄E)段。

42.Manyschoolsdon'tplaceacademiccompetitionsatthetopoftheirprioritylist.

42.Manyschoolsdon'tplaceacademiccompetitionsatthetopoftheirprioritylist.

42.【解析】J。根据题⼲中的关键词academiccompetitions,priority可定位⾄J)段。

43.ContestantsofelitehighschoolmathcompetitionsaremostlyAsianandwhitestudentsfromwell-offfamilies.

43.【解析】B。根据题⼲中的关键词Asianandwhitestudentsfromwell-offfamilies可定位⾄B段。

44.Somemathtrainingprogramsprimarilyfocusonraisingstudents'mathscores.

44.【解析】M。根据题⼲中的关键词focusonraising...mathscores可定位⾄M)段。

45.Someintensivesummerprogramsareveryexpensivebutmostofthemprovidescholarships.

45.【解析】H。根据题⼲中的关键词expensive,scholarships可定位⾄H)段。

SectionC

Directions:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinished

statements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).Youshoulddecideonthebestchoice

andmarkthecorrespondingletteronAnswerSheet2withasinglelinethroughthecentre.

PassageOne

Questions46to50arebasedonthefollowingpassage.

WelivetodayindebtedtoMcCardell,Cashin,Hawes,Wilkins,andMaxwell,andotherwomenwholiberatedAmerican

fashionfromtheconfinesofParisiandesign.Independencecameintying,wrapping,storing,harmonizing,and

rationalizingthatwardrobe.Thesedesignersestablishedthemodemdresscode,lettingplaysuitsandotheractive

wearoutfitssufficeforcasualclothing,allowingpantstoenterthewardrobe,andprizingrationalismandversatilityin

dress,incontradictiontodressingforanoccasionorallotmentoftheday.FashioninAmericawaslogicaland

answerabletothewillofthewomenwhoworeit.Implicitlyorexplicitly,Americanfashionaddressedademocracy,

whereastraditionalParis-basedfashionwaspreiveandimposedonwomen,willingornot.

Inanearliertime,AmericanfashionhadalsofollowedthedictatesofParis,orevencopiedandpiratedspecificFrench

designs.DesignersportswearwasnotmodeledonthatofEurope,as"modemart"wouldlaterbe;itwasgenuinely

inventedanddevelopedinAmerica.Itsdesignerswerenothigh-endwithsupplementarylines.Thedesignobjective

andthebusinesscommitmentweretosportswear,andthedistinctivetraitswereproblem-solvingingenuityand

realisticlifestyleapplications.Easeofcarewasmostimportant:summerdressesandoutfits,inparticular,werechiefly

cotton,readilycapableofbeingwashedandpressedathome.Closingsweresimple,practical,andaccessible,asthe

modemwomandependedonnopersonalmaidtodressher.Americandesignersprizedresourcefulnessandthe

freedomofwomenwhoworetheclothing.

Manyhavearguedthatthewomendesignersofthistimewereabletoprojecttheirownclothingvaluesintoanew

style.Ofcourse,muchofthisargumentinthe1930s-40swasadvancedbecausetherewaslittleornoexperiencein

justifyingapparel(服装)onthebasisofutility.IfPariswascastaside,thetraditionofbeautywasalsotosomedegree

slighted.Designersportswearwouldhavetobeverifiedbyastandardotherthanthatofpurebeauty;theemulationofa

designer'slifeindesignersportswearwasacrudeversionofthisrelationship.Theconsumerwasultimatelytobe

mentionedaswell,especiallybythelikesofDorothyShaver,whocouldpointtothesalesfiguresatLord&Taylor.

CouldutilityalonejustifythenewideasoftheAmericandesigners?Fashionisoftenregardedasapursuitofbeauty,

andsomecherishedfashion'strivialrelationshiptothefinearts.WhatthedesignersoftheAmericansportswear

provedwasthatfashionisagenuinedesignart,answeringtothedemandingneedsofservice.Ofcoursethese

practical,insightfuldesignershavedeterminedthecourseoflatetwentieth-centuryfashion.Theywerethepioneersof

genderequity,intheiruseful,adaptableclothing,whichwasbothmadeforthemassesandcapableofself-expression.

46.WhatcontributiondidthewomendesignersmaketoAmericanfashion?

A)TheymadesomeimprovementsonthetraditionalParisiandesign.

B)TheyformulatedadresscodewithdistinctiveAmericanfeatures.

C)Theycameupwithabrandnewsetofdesignprocedures.

D)Theymadeoriginalityatoppriorityintheirfashiondesign.

【答案】B

【解析】B。细节题。根据题⽬中的关键词women,designers,Americanfashion可定位⾄原⽂的第⼀段。因此选B。

47.WhatdowelearnaboutAmericandesignersportswear?

A)ItimitatedtheEuropeanmodel.

B)Itlaidemphasisonwomen'sbeauty.

C)ItrepresentedgenuineAmericanart.

D)Itwasacompletelynewinvention.

【答案】C

【解析】根据题⽬中的关键词designersportswear可定位⾄原⽂的第⼆段。因此选C。

48.WhatcharacterizedAmericandesignersportswear?

A)Pursuitofbeauty.B)Decorativeclosings.

C)Easeofcare.D)Fabricquality.

【答案】C

【解析】C。本题定位⾄原⽂的第⼆段。因此选C。

49.Whatoccurredinthedesignofwomen'sapparelinAmericaduringthe1930s-40s?

A)Ashiftofemphasisfrombeautytoutility.B)TheemulationoftraditionalParisiandesign.

C)Asearchforbalancebetweentraditionandnovelty.

D)Theinvolvementofmorewomeninfashiondesign.

【答案】A

【解析】A。根据题⽬中的关键词1930s-40s可定位⾄第三段。因此选A。

50.WhatdowelearnaboutdesignersofAmericansportswear?

A)Theycateredtothetasteoftheyoungergeneration.

B)Theyradicallychangedpeople'sconceptofbeauty.

B)Theyradicallychangedpeople'sconceptofbeauty.

C)Theyadvocatedequitybetweenmenandwomen.

D)TheybecamerivalsoftheirParisiancounterparts.

【答案】B

【解析】本题定位⾄最后⼀段。因此选B。

PassageTwo

Questions51to55arebasedonthefollowingpassage.

Massiverubbishdumpsandsprawlinglandfillsconstituteoneofthemoreuncomfortableimpactsthathumanshaveon

wildlife.Theyhaveledsomebirdstogiveuponmigration.Insteadofflyingthousandsofmilesinsearchoffood,they

makethewastesitestheirwinterfeedinggrounds.

ResearchersinGermanyusedminiatureGPStagstotrackthemigrationsof70whitestorks鹳)fromdifferentsites

(

acrossEuropeandAsiaduringthefirstfivemonthsoftheirlives.Whilemanybirdstravelledalongwell-knownroutes

towarmerclimates,othersstoppedshortandspentthewinteronlandfills,feedingonfoodwaste,andthemultitudesof

insectsthatthriveonthedumps.

Intheshort-term,thebirdsseemtobenefitfromoverwintering(

过冬)onrubbishdumps.AndreaFlackoftheMaxPlanck

InstitutefoundthatbirdsfollowingtraditionalmigrationroutesweremorelikelytodiethanGermanstorksthatflewonly

asfarasnorthernMorocco,andspentthewinterthereonrubbishdumps."Forthebirdsit'saveryconvenientwayto

getfood.Therearehugeclustersoforganicwastetheycanfeedon,"saidFlack.Themealsarenotparticularly

appetising,orevensafe.Muchofthewasteisdiscardedrottenmeat,mixedinwithotherhumandebrissuchasplastic

bagsandoldtoys.

"It'sveryrisky.Thebirdscaneasilyeatpiecesofplasticorrubberbandsandtheycandie,"saidFlack."Andwedon't

knowaboutthelong-termconsequences.Theymighteatsomethingtoxicanddamagetheirhealth.Wecannot

estimatethatyet."

ThescientiststrackedwhitestorksfromdifferentcoloniesinEuropeandAfrica.TheRussian,GreekandPolishstorks

flewasfarasSouthAfrica,whilethosefromSpain,TunisiaandGermanyflewonlyasfarastheSahel.

LandfillsitesontheIberianpeninsulahavelongattractedlocalwhitestorks,butalloftheSpanishbirdstaggedinthe

studyflewacrosstheSaharadeserttothewesternSahel.Writinginthejournal,thescientistsdescribehowthestorks

fromGermanywereclearlyaffectedbythepresenceofwastesites,withfouroutofsixbirdsthatsurvivedforatleast

fivemonthsoverwinteringonrubbishdumpsinnorthernMorocco,insteadofmigratingtotheSahel.

Flacksaiditwastooearlytoknowwhetherthebenefitsofplentifulfoodoutweighedtherisksoffeedingonlandfills.

Butthat'snottheonlyuncertainty.Migratingbirdsaffectecosystemsbothathomeandattheirwinterdestinations,and

disruptingthetraditionalroutescouldhaveunexpectedsideeffects.Whitestorksfeedonlocusts(蝗⾍)andother

insectsthatcanbecomepestsiftheirnumbersgetoutofhand."Theyprovideausefulservice,"saidFlack.

51.Whatistheimpactofrubbishdumpsonwildlife?

A)Theyhaveforcedwhitestorkstosearchforsaferwintershelters.

B)Theyhaveseriouslypollutedtheplaceswherebirdsspendwinter.

C)Theyhaveacceleratedthereproductionofsomeharmfulinsects.

D)Theyhavechangedthepreviousmigrationhabitsofcertainbirds.

【答案】D

【解析】根据题⼲关键词rubbishdumps和wildlife,以及题⽬顺序定位⾄⽂章第⼀段。因此选D。

52.Whatdowelearnaboutbirds