2026年大学英语六级考试试题及答案

2026年大学英语六级考试试题及答案Directions:Forthispart,youareallowed30minutestowriteanessaycommentingonthesaying“Thebestpreparationfortomorrowisdoingyourbesttoday”.Youshouldwriteatleast150wordsbutnomorethan200words.Manypeopleholdtheviewthatfuturesuccessdependsonelaboratelong-termplans,whilefewnoticethatdown-to-eartheffortsindailylifelaythesolidfoundationfortomorrow’sachievements.Thesayingmentionedaboveperfectlyrevealsthetruththatthemosteffectivewaytoprepareforfutureistofulfilleverycurrenttaskwell.Nomatterhowgrandourgoalsare,theycanneverbeachievedwithoutsmallaccumulationsoftoday’sefforts.Forcollegestudents,thistruthisparticularlyinstructive.Insteadofbeinganxiousaboutuncertainfutureorindulginginunrealisticfantasiesaboutsuccess,weshouldfocusoneverylectureweattend,everypaperwefinishandeveryskillwepracticeatpresent.Onlywhenwedoourbestinthepresentcanweseizetheopportunitywhenitcomestomorrowandachieveourlong-termgoalseventually.ListeningComprehensionSectionAQuestions1to4arebasedontheconversationyouhavejustheard.1.A)Heisgoingtotakeabusinesstriponweekend.B)Heisapplyingforanewpositioninthecompany.C)Heneedstoarrangetheannualsalesmeetingnextmonth.D)Hehastodealwithanemergencyclientissuerightnow.2.A)Checktheexperienceofthecandidates.B)Sortouttheapplicationmaterialsfortheinterview.C)Arrangethetimeandvenuefortheinterview.D)Contacttheshortlistedcandidatesforconfirmation.3.A)Itrequiresunderstandingofcross-culturalcommunication.B)ItinvolvesfrequentbusinesstripstoSoutheastAsia.C)Itneedsgoodcoordinationwiththelocalmarketingteam.D)Itfocusesonexpandingnewcustomergroupsinemergingmarkets.4.A)Offerheracopyofthejobdescription.B)Giveheralistofinterviewquestions.C)Sendhertheteam’srecentworkreport.D)Introducehertothemarketingdirector.Questions5to8arebasedontheconversationyouhavejustheard.5.A)Theimpactofremoteworkonemployeeproductivity.B)Thedifferencesbetweenofficeworkandhybridwork.C)Theresultofanewworkplacesurveybythewoman’steam.D)Theadjustmentofcompany’sworkingpolicynextquarter.6.A)Mostemployeesprefercomingtoofficethreedaysaweek.B)Employeesunder30preferfullremoteworkmorethanolderones.C)Productivitydropsby15%whenemployeesworkfullyremotely.D)Teamcollaborationismoreefficientinafullyin-officemode.7.A)Itprovidesmoreopportunitiesforinformalcommunication.B)Ithelpsemployeesbalancepersonallifeandworkbetter.C)Itcutsdownthecompany’sexpenditureonofficerent.D)Itattractsmorejobapplicantsfromdifferentregions.8.A)Adjustthenumberofrequiredin-officedaysfordifferentteams.B)Offerextraallowancestoemployeeswhocometoofficeeveryday.C)Holdmonthlyteambuildingactivitiestoimprovein-officeinteraction.D)Carryoutathree-monthtrialofthehybridworkingpolicy.SectionBQuestions9to11arebasedonthepassageyouhavejustheard.9.A)IthasbecomeamajorsourceofurbangarbageinmostEuropeancities.B)Itcanbeturnedintobuildingmaterialsafterspecialprocessing.C)Itcontainsmorenutrientsthanmanycommonorganicfertilizers.D)Itcausesmorecarbonemissionswhenburiedthanplasticwaste.10.A)Itsimplifiestheprocessingofcoffeewaste.B)Itreducestheprocessingcostby30percent.C)Itcanextractusefulmaterialswithoutchemicaladditives.D)Itcanprocessalargeramountofwasteperhourthantraditionalmethods.11.A)Cooperatewithlocalcoffeechainstocollectwaste.B)Promotetheirrecycledproductstoconstructioncompanies.C)Applytheirtechnologytoothertypesoforganicwaste.D)Expandtheirproductionfactorytomeetmarketdemand.Questions12to15arebasedonthepassageyouhavejustheard.12.A)Ithelpspeopleremembermoredetailsoftheirdailylife.B)Itimprovespeople’sabilitytofocusonthepresentmoment.C)Itreducespeople’sanxietyaboutpastfailuresandfutureuncertainty.D)Itchangesthewaypeoplestoreandsharetheirpersonalexperiences.13.A)Theytendtotakemorephotostorecordmoreexperiences.B)Theypaylessattentiontotheexperienceitselfwhentakingphotos.C)Theycanrecalltheexperiencemorevividlythanthosewhodon’ttakephotos.D)Theyaremorewillingtosharetheirexperienceswithothersafterthetrip.14.A)Itdistractspeople’sattentionfromnegativefeelings.B)Ithelpspeoplesortouttheiremotionsinarationalway.C)Itenablespeopletoconnectcurrentfeelingswithpastexperiences.D)Itencouragespeopletonoticemorepositivedetailsindailylife.15.A)Itisausefultoolforimprovingpeople’smentalwell-being.B)Itdoesmoreharmthangoodtopeople’sexperienceperception.C)Itsnegativeeffectonmemoryisoftenoverestimated.D)Itspopularitycomesfrompeople’sneedforsocialinteraction.SectionCQuestions16to18arebasedonthelectureyouhavejustheard.16.A)Howurbangreenspacesaffectresidents’mentalhealth.B)Whymorepeoplechoosetoexerciseincityparksnow.C)Thedifferencebetweenplannedandunplannedurbangreenspaces.D)Waystoimprovethedesignofurbanpublicgreenspaces.17.A)Theyaremorelikelytohavelowerlevelsofstresshormones.B)Theyhavemoreopportunitiestoparticipateinoutdooractivities.C)Theybuildclosersocialconnectionswithneighborsinthecommunity.D)Theyaremorewillingtoadoptahealthylifestyleindailylife.18.A)Increasetheareaofgreenspacesinthecitycenter.B)Addmoregreenpatchestoresidentialandworkingareas.C)Encourageresidentstoplantmoretreesintheiryards.D)Improvetheaccessibilityoflargecityparksforallresidents.Questions19to22arebasedonthelectureyouhavejustheard.19.A)ItwasinventedbyaccidentbyaGermanchemistinthe19thcentury.B)Itwasoriginallydevelopedasasubstitutefornaturalrubber.C)Itusedtobethemostwidelyusedmaterialforfoodpackaging.D)Itcanbebrokendownintonon-toxicsubstancesunderhightemperature.20.A)Theycanbreakdownplasticinamuchshortertime.B)Theycaneatplasticandproduceorganicfertilizerasoutput.C)Theycanworkatnormalroomtemperaturewithoutspecialequipment.D)Theycanbeusedtodealwithdifferenttypesofplasticwaste.21.A)Itishardtocontroltheiractivityinnaturalenvironment.B)Itcoststoomuchtocultivateenoughquantityofthebacteria.C)Theymaycausedamagetousefulmaterialsinlandfills.D)Theirby-productsmaycausenewpollutiontosoilandwater.22.A)Ithasachievedlarge-scalecommercialapplicationinEurope.B)Itisstillattheexperimentalstageandfarfrompracticaluse.C)Itcanbecombinedwithotherwasteprocessingtechnologiestoimproveefficiency.D)Itwillbecomethemainsolutiontotheglobalplasticwastecrisisinfiveyears.Questions23to25arebasedonthelectureyouhavejustheard.23.A)Ithelpspeoplemakemorerationaldecisionsindailylife.B)Itisthemostimportantfactoraffectingpersonalcareersuccess.C)Itcanbeimprovedthroughcontinuoustraininginadulthood.D)ItisamoreimportantpredictorofsuccessthanIQ.24.A)Peoplewithhighemotionalintelligencearebetterathidingtheirnegativefeelings.B)Emotionalintelligencecanhelppeoplereducetheimpactofnegativestress.C)Emotionalintelligencehelpspeoplebuildmorestableinterpersonalrelationships.D)Peoplewithhighemotionalintelligencearemorelikelytotakecalculatedrisks.25.A)Practicingidentifyingyourownemotionscorrectly.B)Reflectingonyouremotionalreactionseveryday.C)Learningtorespondinsteadofreactingwhenfacingpressure.D)Keepingapositivemoodbydoingregularexercise.Answer:1.C2.D3.B4.A5.C6.A7.B8.D9.C10.C11.C12.D13.B14.A15.C16.A17.A18.B19.B20.A21.D22.C23.C24.A25.DReadingComprehensionSectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Manyurbancommunitiesarenowpromotingtheconceptof“15-minutecities”,whichaimtoensurethatallresidentscanaccessbasicservices,includinggrocerystores,hospitals,parksandpublictransport,withina15-minutewalkorbikeridefromtheirhome.Theideahasgained__26__aroundtheworldascitiestrytoreducecarbonemissionsfromprivatecarsandbuildmorelivablespaces.Proponentsof15-minutecitiesarguethattheconceptnotonlycutsvehicleuseand__27__pollution,butalsoencouragesmoreface-to-faceinteractionbetweenresidents,whichhelpsbuildstrongercommunity__28__.Opponents,however,haveraisedconcernsthatthepolicywill__29__restrictresidents’mobilityandleadtohigherpricesforlocalservices,asdemandforhousinginwalkablecommunitiesincreases.Manystudieshaveshownthatthe15-minutecitydesigncanbring__30__healthbenefitstoresidents,becausepeopleareencouragedtowalkorcyclemoreinsteadofdriving,whichincreasesphysicalactivitylevelsandreducestheriskofchronicdiseases.Cityplannersalsopointoutthattheconceptisnotabout__31__peoplefromtravelingoutsidetheirlocalneighborhoods,butaboutre-organizingurbanspacetoreducetheneedforlong-distancecommuting.Toachievethegoal,manycitieshavestartedto__32__oldindustrialareasintomixed-useneighborhoodsthatcombineresidential,commercialandpublicservicespaces.Somecitieshavealsoadjustedparkingpoliciesto__33__privatecaruseandimproveinfrastructureforwalkingandcycling.Whiletheimplementationof15-minutecitiesstillfacesmany__34__,mosturbanpolicyexpertsagreethattheconceptrepresentsa__35__sustainabledirectionforfutureurbandevelopment.Wordbank:A)significantB)bondsC)popularityD)graduallyE)strictlyF)reduceG)obstaclesH)fundamentallyI)preventJ)transformK)discourageL)connectionsM)overcrowdingN)restrictO)limitingAnswer:26.C27.F28.B29.E30.A31.O32.J33.K34.G35.HSectionBDirections:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmaychooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.AnswerthequestionsbymarkingthecorrespondingletteronAnswerSheet2.WhyAreMoreYoungPeopleChoosingtoLiveinSmallTowns?[A]Fordecades,thegeneraltrendofpopulationmovementinmostdevelopedcountrieshasbeenfromsmalltownsandruralareastobigcities.Youngpeopleleavetheirhometownsforlargeurbancenterstoseekbettereducationopportunities,higher-payingjobsandmorediversesociallives.However,anewtrendhasemergedoverthepastdecade,particularlyacceleratedaftertheCOVID-19pandemic:moreandmoreyoungpeopleagedbetween20and35arechoosingtoleavebigcitiesandsettledowninsmalltownswithapopulationoflessthan50,000.[B]A2024surveyconductedbythePewResearchCenterfoundthat34%ofyoungworkerswhomovedtosmalltownsbetween2020and2025citedthelowercostoflivingasthetopreasonfortheirmove.TheaveragehousingpriceinasmalltownintheUnitedStatesislessthanhalfofthatinamajormetropolitanarea,andrentisalsoabout40%lower.Foryoungpeoplewhojustgraduatedfromcollegeandareburdenedwithstudentloans,buyingasmallhouseinasmalltownismuchmoreachievablethanbuyinganapartmentinabigcity.Thelowerlivingcostalsomeansthatyoungpeoplecansavemoremoneyeverymonthandhavemorefinancialbuffertodealwithunexpectedexpenses.[C]Thesecondbiggestdriverofthistrendisthepopularityofremotework.Beforethepandemic,onlyabout15%offull-timejobscouldbedoneremotely,butafter2023,thatnumberhasrisento45%,accordingtodatafromtheU.S.BureauofLaborStatistics.Manytechcompanies,mediaoutletsandfinancialserviceinstitutionshaveadoptedpermanentremoteorhybridworkpolicies,whichmeansemployeesdonothavetolivenearthecompany’sofficetodotheirjobs.Thiseliminatesthebiggestbarrierforyoungpeoplewhowanttomovetosmalltownsbutstillkeeptheirhigh-payingjobsthatoriginallyexistedonlyinbigcities.[D]Someyoungpeoplemovetosmalltownsnotjustforlowercostandremotework,butalsoforabetterqualityoflife.Inbigcities,mostpeoplespendanaverageof90minutesadaycommutingtoandfromwork,whichtakesalotoftimethatcouldhavebeenspentonhobbies,exerciseortimewithfamily.Insmalltowns,theaveragecommutetimeislessthan20minutes,andtheenvironmentisquieterandlesscrowded.Manyyoungpeoplesaythattheynolongerfeelanxiousaboutbeingstuckinarushhoursubwayorcompetingforresourceswiththousandsofpeopleeveryday.[E]Thepopularityofsmall-townlivingamongyoungpeoplehasalsobroughtnewopportunitiestosmalltownsthathavebeensufferingfrompopulationdeclinefordecades.Manyofthesesmalltownsarenowrollingoutpreferentialpoliciestoattractyoungnewresidents,suchasofferinghousingsubsidies,taxbreaksforremoteworkersandimprovinglocalpublicinfrastructureincludingbroadbandnetworksandpublicculturalfacilities.InsomesmalltownsinthewesternUnitedStates,localgovernmentsevenoffercashincentivesofupto$10,000forremoteworkerswhomovethereandstayformorethanayear.[F]However,thisnewtrendalsofacessomechallenges.Thebiggestcomplaintfromyoungpeoplewhomovedtosmalltownsisthelackofdiversejobopportunitiesiftheywanttochangetheirjobs.Ifayoungpersonworkingremotelyforabigcitycompanywantstoswitchtoalocaljob,theoptionsareverylimited,especiallyforpeopleinspecializedindustriessuchasdigitalmarketingorsoftwaredevelopment.Anothercommonproblemisthelackofdiversesocialactivities.Manysmalltownshavefewbars,concertvenuesorartgalleries,anditisharderforyoungnewresidentstomeetpeoplewithsimilarinterests.[G]Anotherchallengeisthedigitaldivide.Althoughmostsmalltownsnowhavebasicbroadbandaccess,theinternetspeedisoftenslowerandlessstablethanthatinbigcities,whichcancauseproblemsforremoteworkerswhoneedtoattendfrequentvideoconferencesoruploadlargefiles.Someremoteworkersreportthattheyhavetogotoaco-workingspaceinthenearestbigtowneveryweektofinishworkthatrequireshigh-speedinternet.[H]Despitethesechallenges,thetrendofyoungpeoplemovingtosmalltownsisexpectedtocontinueinthenextdecade,accordingtopopulationexperts.Manyyoungpeopletodayarerethinkingtheirdefinitionofsuccess.Insteadofpursuingahighsalaryandafancyjobtitleinabigcityatthecostofphysicalandmentalhealth,theyprefertohaveabalancedlifewheretheycanhaveenoughtimefortheirpersonalinterestsandfamily.Thischangeofvalueisthefundamentaldrivingforcebehindthepopulationmovementtrend.[I]Thetrendalsohasapositiveimpactonbalancingregionaldevelopment.Foralongtime,bigcitieshaveabsorbedmostoftheyoungtalentsandresources,leadingtotheshrinkingofsmalltownsandwiderdevelopmentgapsbetweenregions.Theinflowofyoung,educatedtalentstosmalltownscanbringnewconsumptiondemand,creativityandeconomicvitalitytotheseareas,whichhelpspromotemorebalanceddevelopmentacrossthecountry.[J]Foryoungpeopleconsideringmovingtoasmalltown,expertssuggestthattheyshoulddoenoughresearchbeforemakingthedecision,suchastestingtheinternetspeed,talkingtolocalresidentsaboutthequalityoflife,andmakingsuretheiremployerallowspermanentremotework.Manyexpertsalsoadviseyoungpeopletotrytorentahouseforsixmonthsfirstbeforebuyingaproperty,toseeifthesmalltownlifestylereallysuitsthem.36.Thechangeofyoungpeople’sviewonwhatasuccessfullifeisistherootcauseofthetrendofmovingtosmalltowns.37.Manysmalltownsprovidefinancialrewardstoattractyoungremoteworkerstosettledown.38.Remoteworkpoliciesmakeitpossibleforyoungpeopletokeepwell-paidjobswhilelivinginsmalltowns.39.Youngpeoplemovingtosmalltownsmayfindithardtomeetpeoplewhosharethesamehobbieswiththem.40.Beforethepandemic,mostyoungpeoplemovedfromsmalltownstobigcitiestopursuebetterdevelopmentopportunities.41.Thistrendcanhelpnarrowthedevelopmentgapbetweendifferentregionsofacountry.42.Lowerhousingandlivingcostisthemostcommonreasonforyoungpeopletomovetosmalltowns.43.Unstableandslowinternetconnectionisacommonproblemthattroublesremoteworkerslivinginsmalltowns.44.Shortercommutetimeleavesyoungpeoplemoretimeforpersonallifeinsmalltowns.45.Youngpeoplewhowanttochangejobsmayfacelimitedchoiceswhentheyliveinsmalltowns.Answer:36.H37.E38.C39.F40.A41.I42.B43.G44.D45.FSectionCDirections:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA),B),C)andD).YoushoulddecideonthebestchoiceandmarkthecorrespondingletteronAnswerSheet2.Passage1Inthepastdecade,theuseofsocialmediahasbecomeanearlyuniversalactivityamongyoungpeople,andresearchershavebeenstudyingtheimpactofsocialmediauseonyoungpeople’smentalhealthforyears.AnewlongitudinalstudypublishedintheJournalofAdolescentHealthhasfoundthatitisnothowmuchtimeyoungpeoplespendonsocialmediathataffectsmentalhealth,butwhatkindofcontenttheyconsumeandhowtheyinteractwithothersontheplatforms.Thestudyfollowed1,200adolescentsaged13to17forthreeyears,trackingtheirsocialmediausehabitsandmentalhealthstatuseverysixmonths.Theresearchersdividedparticipantsintofourgroupsbasedontheirusepatterns:activecontentcreatorswhoposttheirowncontentandinteractwithothers,passivescrollerswhoonlybrowsecontentpostedbyotherswithoutinteraction,comparison-orienteduserswhospendmostoftheirtimelookingatcontentpostedbypeersandcelebrities,andconnection-focuseduserswhomainlyusesocialmediatokeepintouchwithfriendsandfamily.Theresultshowedthatcomparison-orientedusershadthehighestlevelofanxietyanddepressionsymptoms,37%higherthantheaveragelevelofthewholesample.Passivescrollersalsohadslightlyhigherlevelsofmentalhealthproblemsthantheaverage.Whatsurprisedtheresearcherswasthatactivecontentcreatorsdidnothavehigherlevelsofmentalhealthproblems,andconnection-focusedusersactuallyhadlowerlevelsofanxietyanddepressionthantheaverage.“Peopleoftenthinkthatanyuseofsocialmediaisbadforyoungpeople,butourresearchshowsthatthenatureoftheusemattersalotmorethantheamountoftime,”saidtheleadresearcherofthestudy.Thestudyalsofoundthatthenegativeimpactofcomparison-orienteduseismoresignificantforgirlsthanforboys.Girlsaremorelikelytocomparetheirappearance,bodyshapeandlifeexperienceswiththeperfectlyeditedcontentpostedbyothersonsocialmedia,whichleadstolowerself-esteemandhigherbodyanxiety.Basedontheresearchfindings,theresearcherssuggestthatinsteadofjustsettingascreentimelimitforyoungpeople,parentsandeducatorsshouldguideyoungpeopletodevelophealthiersocialmediausehabits.Forexample,encourageyoungpeopletousesocialmediamoretoconnectwithfriendsandsharetheirowncreativeworks,ratherthanpassivelybrowsingcontentthattriggersunnecessarycomparison.46.Whatisthemainfindingofthenewlongitudinalstudy?A)Long-termuseofsocialmediadoesgreatharmtoadolescents’mentalhealth.B)Thetypeofsocialmediausehasagreaterimpactthanthelengthofuseonmentalhealth.C)Socialmediausebringsmorebenefitsthanharmstoyoungpeople’smentalhealth.D)Mostyoungpeopledonotrealizehowsocialmediauseaffectstheirmentalhealth.47.Whichgroupofsocialmediausershastheworstmentalhealthstatusaccordingtothestudy?A)Passivescrollerswhoonlybrowsecontentwithoutinteraction.B)Activecontentcreatorswhooftenposttheirownworksonline.C)Userswhomainlyusesocialmediatocomparethemselveswithothers.D)Userswhousesocialmediatokeepintouchwithdistantfamilymembers.48.Whyisthenegativeimpactmoreobviousforgirlsthanboys?A)Girlsaremorelikelytobeaffectedbyothers’opinionsthanboys.B)Girlstendtospendmoretimeonsocialmediathanboysonaverage.C)Girlsaremorelikelytocomparetheirownappearancewitheditedonlinecontent.D)Girlsfacemorepressurefrompeersthanboysindailylife.49.Whatsuggestiondotheresearchersputforwardbasedonthestudy?A)Parentsshouldnotsetanyscreentimelimitforyoungpeople’ssocialmediause.B)Parentsshouldguideyoungpeopletousesocialmediainahealthierwayinsteadofjustlimitingtime.C)Youngpeopleshouldbeencouragedtoreducetheiroverallsocialmediausegradually.D)Socialmediaplatformsshouldremoveallcontentpostedbycelebritiesthatmaytriggercomparison.50.Whatcanbeinferredfromthepassage?A)Socialmediacanhaveapositiveeffectonmentalhealthwhenusedproperly.B)Mostpreviousstudiesonsocialmediaandmentalhealthhavedrawnwrongconclusions.C)Moreyoungpeoplearechangingtheirsocialmediausehabitsinrecentyears.D)Comparison-orienteduseofsocialmediawillleadtopermanentmentalhealthproblems.Answer:46.B47.C48.C49.B50.APassage2Climatechangehasledtomorefrequentextremeweathereventsaroundtheworld,includingsevereheatwavesthatthreatencropproduction.Tocopewithrisingtemperatures,agriculturalresearchershavebeenworkingondevelopingheat-resistantcropvarietiesforyears,buttheprocessusuallytakesmorethanadecadeofcross-breedingtogetthedesiredtraits.Now,newgeneeditingtechnologieshaveshortenedtheprocesstojustafewyears,bringingnewhopeforglobalfoodsecurity.ArecentstudypublishedinSciencereportedthatresearchershavesuccessfullyusedtheCRISPRgeneeditingtechnologytomodifyageneinricethatcontrolstheplant’sresponsetohightemperature.Themodifiedricecanmaintaina90%yieldwhenthetemperatureis6degreesCelsiushigherthantheoptimalgrowingtemperature,whiletheoriginalvarietyonlymaintains40%yieldunderthesamecondition.Thisisabreakthroughindevelopingheat-resistantcrops,accordingtotheresearchteam.Geneeditingtechnologyisdifferentfromtraditionaltransgenictechnology,whichintroducesforeigngenesfromotherspeciesintocrops.Geneeditingonlymodifiestheexistinggenesofthecropitselftoenhancethedesiredtraits,somanycountrieshavelooserregulatoryrulesforgeneeditedcropsthantransgeniccrops.IntheUnitedStates,theDepartmentofAgriculturehasapprovedmorethan10typesofgeneeditedcropsforcommercialcultivation,includingheat-resistantsoybeansanddrought-resistantcorn.However,theapplicationofgeneeditedcropsstillfacessomecontroversies.Someenvironmentalgroupsworrythatthelarge-scalecultivationofgeneeditedcropsmayaffectbiodiversity,becausemodifiedcropsmaycrosswithwildplantsandchangethegeneticstructureofwildspecies.Someconsumersalsohaveconcernsaboutthesafetyofgeneeditedfood,andtheythinkmorelong-termresearchisneededtoconfirmthatmodifiedfoodhasnonegativeimpactonhumanhealth.Supportersofgeneeditedcropsarguethatthetechnologyismuchsaferandmorecontrollablethantraditionalcross-breeding,becausescientistscanaccuratelymodifyonlythetargetgenewithoutchangingotherpartsoftheplant’sgenome.Theypointoutthatglobalfoodproductionneedstoincreaseby70%by2050tofeedthegrowingglobalpopulation,andclimatechangehasposedahugethreattocurrentcropproduction,soweneednewtechnologieslikegeneeditingtoensureglobalfoodsecurity.51.Whatproblemdotraditionalmethodsofdevelopingheat-resistantcropshave?A)Theyusuallytakeaverylongtimetoproducethedesiredvariety.B)Theycannoteffectivelyimprovetheyieldofcropsunderhightemperature.C)Theyoftenproduceunexpectednegativetraitsinmodifiedcrops.D)Theycostmuchmorethannewge