北京市第四中学2024-2025学年高三上学期期中英语试题 含解析

高三英语（试卷满分为100分，考试时间为90分钟）第一部分知识运用（共两节，30分）第一节（共10小题；每小题1.5分，共15分）阅读下面短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题纸上将该项涂黑。AnUnexpectedGiftTwelve-year-oldMathewFloresisdifferentfromotherkids.Helovesjunk(垃圾)mail,andtheseadvertisementsweretheonlyreadingmaterials___1___tohim.Onceheaskedhismailmanifhecouldofferhimsome.Thequestion___2___themailman.Heaskedtheboythereason,andthenrecordedhis___3___inhisFacebook.“Todaywhiledeliveringmail,Isawaboyreadingads,andheaskedmeforextramail.Actuallyhewantstogotothelibrary,buthisfamilyisverypoorandcan’t___4___thebus.”ThemailmanthenaskedhisFacebookfriendsiftheycould___5___somebooksfortheboy.Hewrote,“Mostkidswantelectronicproducts!Butwhathewantsisbooks.It’sgreattoseehisrare___6___,andyoumayhaveseenhimsmilewhenIsaidIcouldhelphim!”“Heiscountingonme,”heconcluded.“SoIamcountingonyou!”ThemailmanthoughttheFacebookpostmight___7___50to60books.Buthis___8___waspassedonquickly.Peoplefromaroundtheworld,includingtheUK,AustraliaandIndia,havesentbooks.Hundredsofbookshavebeendeliveredtotheboy’sdoor,withhundredsmore___9___ontheirway.Whenbooksfirststartedarriving,Floreswasshockedbywhathappened.“Ithoughttheywere____10____,buttheyindeedwereforme.”Hesaysthathecan’twaittosharethebookswithotherkids,andhaspromisedtoreadeveryone.1.A.natural B.available C.common D.familiar2.A.frightened B.disappointed C.surprised D.amused3.A.response B.effort C.decision D.comment4.A.own B.take C.share D.afford5.A.adjust B.examine C.spare D.publish6.A.desire B.effect C.purpose D.value7.A.giveaway B.bringin C.takeon D.putup8.A.belief B.spirit C.secret D.request9.A.only B.nearly C.still D.thus10.A.mistaken B.helpless C.unusual D.awkward【答案】1.B2.C3.A4.D5.C6.A7.B8.D9.C10.A【解析】【分析】这是一篇记叙文。讲述了邮递员无意间发现小男孩儿MathewFlores因贫穷而只看不起书后，将他的故事发到在脸书上，网友们知道后，给小男孩送了好多爱心图书的故事。【1题详解】考查形容词词义辨析。句意：他喜欢垃圾邮件，这些广告是他唯一能得到的阅读材料。A.natural自然的；B.available可获得的；C.common共同的；D.familiar熟悉的。根据第二段中“buthisfamilyisverypoor”可知小男孩之所以读这些垃圾邮件，是因为他的家庭太穷。所以这些广告是他唯一可获得的阅读材料。故选B项。【2题详解】考查形容词词义辨析。句意：这个问题使邮递员大吃一惊。A.frightened害怕的；B.disappointed失望的；C.surprised感到惊讶的；D.amused觉得好笑的。根据分析可知，垃圾邮件一向是人们不喜欢的，而小男孩却问邮递员要垃圾邮件，所以在下一句中“Heaskedtheboythereason”邮递员问小男孩这样做的原因。可知邮递员是感到惊讶的。故选C项。【3题详解】考查名词词义辨析。句意：他问了男孩原因，然后在脸书上记录了他的回答。A.response回答；B.effort努力；C.decision决定；D.comment评论。根据前文“Heaskedtheboythereason”可知，他问了小男孩为什么要这些垃圾邮件，所以这里应该是将小男孩的回答发到了脸书上，故选A项。【4题详解】考查动词词义辨析。句意：实际上他想去图书馆，但他的家庭很穷，付不起乘坐公共汽车的钱。A.own拥有；B.take乘坐；C.share分享；D.afford付得起。根据“buthisfamilyisverypoor”可知，小男孩的家庭很贫困，去图书馆但付不起乘坐公交车的钱。故选D项。【5题详解】考查动词词义辨析。句意：然后，这位邮递员问他脸书上的朋友们是否可以匀出一些书给小男孩。A.adjust调整；B.examine检查；C.spare匀出D.publish出版。根据下句“Mostkidswantelectronicproducts!Butwhathewantsisbooks”以及“somebooksfortheboy.”可知，由于小男孩想要书，所以邮递员想让脸书上的朋友们匀出一些自己的书给小男孩。故选C项。【6题详解】考查名词词义辨析。句意：遇见他这么罕见的心愿真是太好了，当我说我可以帮助他时，你可以想象他当时的笑容。A.desire心愿；B.effect努力；C.purpose目的；D.value价值。根据上文中“Mostkidswantelectronicproducts!Butwhathewantsisbooks”可知大部分的孩子都想要电子产品，而小男孩想要的却是书，他的愿望是很罕见的。故选A项。【7题详解】考查动词词组辨析。句意：邮差本认为脸书上的帖子可能会收获50到60本书。A.giveaway分发；B.bringin收获；C.takeon承担；D.putup张贴。根据下文“Peoplefromaroundtheworld,includingtheUK,AustraliaandIndia,havesentbooks.”以及“50to60books.”可知，脸书上的帖子让他收获了很多书。邮差本认为脸书上的帖子可能会收获50到60本书。故选B项。【8题详解】考查名词词义辨析。句意：但他的请求在网上传播很快。A.belief信仰；B.spirit精神；C.secret秘密；D.request请求。根据上文可知，邮递员向网友们请求捐一些书给小男孩，所以这里他发的帖子应该是请求帮助的，故选D项。【9题详解】考查副词词义辨析。句意：数百本的书已经送到了男孩的门口，还有数百本的书仍然在路上。A.only仅仅；B.nearly差不多；C.still仍然；D.thus因此。根据上文“Hundredsofbookshavebeendeliveredtotheboy’sdoor.”以及“ontheirway”可知，有很多书都已经送到了男孩儿的门口，但还有很多书还没有送到。依旧在路上。故选C项。【10题详解】考查形容词词义辨析。句意：当书开始陆续到达时，Flores被发生的事情震惊了：“我以为他们弄错了，但他们确实是送给我的。”A.mistaken弄错的；B.helpless无用的；C.unusual不寻常的；D.awkward尴尬的。根据本句中的连接词but表示转折，可知，弗洛雷斯一开始很惊讶，以为书是别人寄错了的。但后来知道书的确是送给他的。故选A项。第二节（共10小题；每小题1.5分，共15分）A阅读下面短文，根据短文内容填空。在未给提示词的空白处仅填写1个恰当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。TheInternationalWorkers’Day,also___11___(call)LaborDayorMayDay,servesasacelebrationofworkersacrossthewholesocialspectrum(范围).Chinesepeoplecelebratetheirholidaywitharangeofactivities.It’satime___12___relaxation,asworkersenjoyadayoff.Thisyear’sholidaylastedfromMay1toMay5,duringwhichtimemanypeoplechose___13___(travel)toscenicspots,goshopping,visitexhibitions,orjustenjoytheirtimeoffworkwithfamilyandfriends.Parksandpublicattractionsacrossthecountrywerefilledwithvisitorseagertoenjoytheirvacation.【答案】11.called12.for13.totravel【解析】【导语】本文为一篇说明文，介绍了什么是国际劳动节，中国今年劳动节的时间及人们在期间的活动。【11题详解】考查非谓语动词。句意：国际劳动节，也被称为劳动节或五一，是整个社会阶层的工人的庆祝活动。句子的谓语为serves，空处为非谓语动词作定语，TheInternationalWorkers’Day与call为被动关系，用过去分词。故填called。【12题详解】考查介词。句意：这是一个放松的时间，因为工人们享受一天的假期。relaxation为名词，空处为介词。timefor…意思为：……的时间。故填for。【13题详解】考查非谓语动词。句意：今年假期从5月1日持续到5月5日，在此期间，许多人选择去旅游景点，购物，参观展览，或只是与家人和朋友享受他们的假期。choosetodo意思为：选择做某事，空处用不定式作宾语。故填totravel。B阅读下面短文，根据短文内容填空。在未给提示词的空白处仅填写1个恰当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。InMiskolc,anortheasterncityinHungary,FanLiyunhaswitnessed___14___acupofteamakesadifferenceinculturalexchanges.Fan,59,___15___(work)attheConfuciusInstituteoftheUniversityofMiskolcasaChineseteachercurrently.Sheobservesthattheinstituteisseeingmorestudentswhoarecuriousabouttheinstitute’scoursesthisspringsemester.“Weusuallyheldactivitiestoattractstudentsbeforenewsemesters.Butitseemsit’snolongernecessaryaswealmost___16___(finish)enrollmentbeforethissemesterstarted,saidFan,whowasknownasKristibyherstudents.“Ithinknowthenumberofstudents___17___(study)inourinstitutehasatleastdoubled,comparedtowhenIfirstarrivedherein2019.”【答案】14.how15.works16.hadfinished17.studying【解析】【导语】本文为一篇新闻报道，介绍了一位中国老师范丽云在匈牙利一所大学掀起了一股茶文化热潮，引起了孔子学院的学生报名人数激增。【14题详解】考查宾语从句。句意：在匈牙利东北部城市米什科尔茨，范丽云见证了一杯茶如何对文化交流产生了巨大的影响。witness后为宾语从句，从句基本结构完整，结合句意，表示“如何”用连接副词how。故填how。【15题详解】考查动词时态。句意：现年59岁的范目前在米什科尔茨大学孔子学院任教。空处作谓语，根据currently可知，句子描述当下发生的事情，结合work可知，此句用一般现在时表示目前情况。主语为第三人称单数，谓语动词用第三人称单数形式。故填works。【16题详解】考查动词时态。句意：但现在看来已经没有必要了，因为在这学期开始之前，我们几乎已经完成了报名，范说，她的学生们都叫她克里斯蒂。空处作as引导从句的谓语动词，根据before引导时间状语从句中的谓语动词started，结合语境可知，在学期开始前报名已经完成，表示过去的过去，用过去完成时。故填hadfinished。【17题详解】考查非谓语动词。句意：与我2019年刚来的时候相比，我认为现在在我们学院学习的学生人数至少翻了一番。句中已有谓语动词has，空处应用非谓语动词修饰students作定语，students与study构成主动关系，用现在分词。故填studying。C阅读下面短文，根据短文内容填空。在未给提示词的空白处仅填写1个恰当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。Thecrisisoffoodwasteand___18___(lose)hasreachedalarminglevelsglobally,graduallyweakeningeffortstoeliminatehunger,povertyandenvironmentalpollution,saidtheUnitedNationsEnvironmentProgram(UNEP)inanewreportlaunchedWednesday.TheUNEPFoodWasteIndexReport2024thesecondeditionofthiskind,___19___(launch)inNairobi,theKenyancapital,aheadoftheInternationalDayofZeroWastewhichfallsonSaturday.Theworldwasted1.05billiontonsoffoodin2022,equivalentto132kilogramsperpersonandone-fifthofallfoodavailabletoconsumers,saidthereport___20___wasco-authoredbyUNEPandWRAP,aBritishenvironmentalcharity.【答案】18.loss19.waslaunched20.which##that【解析】【导语】本文为一篇新闻报道，由联合国环境规划署（UNEP）发布的报告称，全球粮食浪费和损失危机已达到令人震惊的水平。【18题详解】考查名词。句意：联合国环境规划署（UNEP）在周三发布的一份新报告中称，全球粮食浪费和损失危机已达到令人震惊的水平，逐渐削弱了消除饥饿、贫困和环境污染的努力。空处与waste并列，用名词作宾语。故填loss。【19题详解】考查动词时态和语态。句意：联合国环境规划署的《食物浪费指数报告2024》（这是此类报告的第二版）于周六国际零浪费日之前在肯尼亚首都内罗毕发布。空处作谓语，主语TheUNEPFoodWasteIndexReport2024thesecondedition为单数，与launch之间为被动关系，句子描述报告发布在过去，用一般过去时的被动语态。故填waslaunched。【20题详解】考查定语从句。句意：这份由联合国环境规划署和英国环保慈善机构WRAP共同撰写的报告称，2022年全球浪费了10.5亿吨食物，相当于每人132公斤，占消费者所能获得的所有食物的五分之一。空处引导限制性定语从句，先行词为thereport，为物，作从句的主语，用关系代词which/that引导从句。故填which/that。第二部分阅读理解（共两节，38分）第一节（共14小题；每小题2分，共28分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。ATherearemanywaystogetinvolvedandvolunteerattheNationalMuseumofAmericanHistory.BecomingaMuseumAmbassadorisoneofthem.Tolearnmoreaboutthisvolunteerprogram,pleaseseethedescriptionsbelow.MuseumAmbassadorsattheAmericanHistoryMuseumareamobilesourceofinformationthathelpsbridgethegapbetweentwoothervolunteergroupshereatthemuseum—informationdeskspecialists,whoprovideorientation(方向)assistancewhenguestsarrive,andvolunteerdocents(讲师),whoprovideHighlightstours,facilitatehands-ondemonstrationsandcirculatethroughmanyofourexhibitionstointeractwithvisitors.Eachyear,ourMuseumAmbassadorshelpover100,000peoplegetthemostoutoftheirvisitsbywelcominggroups,circulatingthroughoutthemuseum'spubliczonestoanswerbasicquestions,anddirectingvisitorstoprogramsandexhibitionsofinterest.ThemuseumhasalsoemployedtheMuseumAmbassadorstoassistwithspecialprojectsandeventsasneeded.TolearnmoreaboutwhatMuseumAmbassadorsdo,checkoutwhatLarryhassaid,“Asmuseumambassadors,wegettoshareinthecuriosityofachild,thenostalgia(怀旧)ofreturningvisitors,thetreasurehuntofstudentsassignedtofindimportanthistoricalobjects,andtheamazementofthoseexperiencingoureyeonthenation'shistoryforthefirsttime.Wecanhelprecommendameaningfulmuseumvisitjustforyou.There'smore.We'realsotrafficcopswhenelevatorsandescalatorsbreakandextraeyesformuseumsecurity."Ifyouenjoy…•interactingwithdiverseaudiences,agegroupsandlearningstyles.•workinginanoftenbusyandchangingenvironment.Ifyouhave…•stronginterpersonalandcommunicationskills.•aninterestinhistoryandcommunication.Ifyoucan…committothreeshiftsamonth(weekdayAmbassadors)ortwiceamonth(weekendAmbassadors).Themuseumisopen364daysayear,includingweekendsandholidays.•handlefrequentwalking,standing,andtalking.ToApplyTolearnmoreinformationabouttheapplicationprocess,pleasecontactRuthShirley.NOTE:Acceptanceintotheprogramissubjecttosuccessfulcompletionofaninterviewandbackgroundinvestigation.21.WhichoneistheresponsibilityofMuseumAmbassadors?A.Toreceivevisitorsattheentrance.B.Totakefullchargeofmuseumsecurity.C.Todirectvisitorstotheirexhibitionsofinterest.D.Tohelpvisitorswithhands-ondemonstrations22.AqualifiedMuseumAmbassadorshould________.A.enjoycommunicatingwithpeopleB.speakatleasttwoforeignlanguagesC.haveacademicbackgroundinhistoryD.committoworkingthreeshiftsatweekends23.Theauthorwritesthispassagemainlyto__________.A.introducevolunteerprogramsforteenagersB.providespecialtourstomeetdifferentneedsC.invitepeopletovisittheAmericanHistoryMuseumD.attractpotentialapplicantsforMuseumAmbassadors【答案】21.C22.A23.D【解析】【分析】这是一篇应用文。文章主要通过介绍博物馆大使这个志愿者工作，来吸引有意申请博物馆大使的人士。【详解】1.细节理解题。根据第二段中的“Eachyear,ourMuseumAmbassadorshelpover100,000peoplegetthemostoutoftheirvisitsbywelcominggroups,circulatingthroughoutthemuseum'spubliczonestoanswerbasicquestions,anddirectingvisitorstoprogramsandexhibitionsofinterest.(每年，我们的博物馆大使所做的是欢迎游客，在博物馆的公共区域巡回且回答游客的基本问题，并引导参观者参观感兴趣的项目和展览，通过做这些，我们的博物馆大使帮助了超过10万人，使他们在自己的旅游参观中有最大的收获。)”可知，博物馆大使的职责之一就是引导游客参观他们感兴趣的展览。故选C。2.细节理解题。根据Ifyouhave…部分“•stronginterpersonalandcommunicationskills.•aninterestinhistoryandcommunication.(较强的人际交往和沟通能力。对历史和沟通有兴趣。)”可知，一个合格的博物馆大使应该是喜欢与人交流和沟通，A项“enjoycommunicatingwithpeople(喜欢和人交流)”符合，B项“speakatleasttwoforeignlanguages(至少会说两种外语)”文中没有提到，C项“haveacademicbackgroundinhistory(具有历史学术背景)”文中也没有提到，文中只提到对历史感兴趣，所以C不对；根据Ifyoucan…部分中“twiceamonth(weekendAmbassadors).(一月两次换班（周末大使）)”可知，D选项“committoworkingthreeshiftsatweekends(承诺周末三班倒)”不符，故选A。3.推理判断题。通读全文可知，文章第一段主要介绍了成为博物馆大使，可以在美国历史博物馆做志愿者。第二段主要介绍了博物馆大使的职责。第三段介绍了成为博物馆大使的一些好处。接着文章从申请人的意愿，条件，要求，申请等几个方面介绍博物馆大使的工作。所以可以得知，文章主要目的是为了吸引有意申请博物馆大使的人士，故选D。B“No,”MamaLilsaiditplainandsimple.“Iain’tneverheardofnogirlstobedoingthat.Bebe,youneedtobegettingyourselfarealsummerjob,somethingcivilized.”I’dbeenlivingwithMamaLilsinceIwassix,whenmyownmamaanddaddywerekilledinanapartmentbuildingfire.LillianJohnswasmymom’smother.EverybodyonourstreetcalledherMamaLilandthatwaswhatIcalledhertoo.IhadbeenbuttingheadswithhereversinceIcouldremember.AndtheolderIgot,themoreatoddswewereandthemoreconflictsweexperienced.ForweeksI’dbeenaskingMamaLiltoletmejointheyouthrenovation(修缮)team.ItwasagroupofkidswhohadbeenchosenbycityofficialstoworkwithengineerstohelprepairtheBrooklynBridge.Theprojectwouldlastthesummerandpaygoodmoney.Itwouldhelpmegettocollege,whereIwantedtostudyengineering.ButforMamaLil,thethingthatmadeherthemoststubbornthistime,wasexactlymydreamofbecominganengineer.Insomerespects,MamaLilwasright.Itwastruethatthereweren’tmanyblackwomenengineers.ButIwantedtobuildbridgesmorethananything.“Letmego,MamaLil,”Ibeggedsoftly.MamaLilsatasstillasastatue.“MamaLil,”Isaidcarefully,“ifyoudon’tsignthebridgeprojectpermissionform,Iwillsignitmyself.Nobodywillknowthedifference.”Thenextmorning,MamaLil’seyeslookedred-tired.“I’mgoingtothebridge,”Isaidfirmly.“Iknow,Bebe,”shesaid.Fromherhousedresspocket,shetookoutapenandsignedtheform.“Bebe,thatbridgeisluckytohaveyou,”shesaid.IhuggedMamaLilgoodandhard,smilingbig,rightather.…Ahead,inthedistance,stoodtheBrooklynBridge.Thiswasthebestspottoseethebridge.I’dcometothiscornerandstudiedthebridgeamilliontimes.Andoneveryoneofthosetimes,IwastakenwithwhatI’dcometocallBrooklynBelle.Atnight,Bellewasdressedintinylight.Onacloudlessnightlikethisone,shewasasightlikenootherinthewholecity.Jeweledinlight.Beautiful.IhaddrawnBelleinthehigh-noonlight,atsunset,onsnowydays,andonfoggytwilightmornings...Iwasproudofmydrawings,butwitheachpagetheyshowedasadtruthaboutBelle:Sheneededrepair.Thatbridgerenovationprojectneededme;andIneededit,inmorewaysthanIcouldcount.24.MamaLilrefusedtosignthepermissionformmainlybecause______.A.shehadbecomestubborninheroldageB.shewouldn’tallowBebetohaveasummerjobC.shethoughtthebridgeprojectwastoodangerousD.shedidn’tsupportBebe’sdesiretobeanengineer25.Whatcanwelearnfromthestory?A.Bebelostherparentsinthebridgeproject.B.Bebelikedtodrawthebridgeonwintermornings.C.BebeandMamaLiloftengotintoargumentswitheachother.D.BebecalledhergrandmaMamaLilbecauseshewashermom’smother.26.Bymentioningthename“BrooklynBelle”,theauthorintendstohelpreaders______.A.recallthehistoryofthebridgeB.appreciatethebridge’sbeautyC.ignorethedamagetothebridgeD.imaginethebridge’sfuturelook27.Whichofthefollowingcouldbethethemeofthisstory?A.Dreamsknownocolororgender.B.Eldersalwaysmakethebestdecisions.C.Conflictusuallyresolvesitselfintheend.D.Pridewinsoutbutmakesthingsmoredifficult.【答案】24.D25.C26.B27.A【解析】【分析】本文是一篇记叙文，主要讲的是作者想要参加修复布鲁克林大桥的项目，作者的外婆不允许作者当工程师，因为当时黑人女性工程师并不多，但是最后她的外婆终于同意了。【24题详解】细节理解题。根据第四段的“ButforMamaLil,thethingthatmadeherthemoststubbornthistime,wasexactlymydreamofbecominganengineer.”（但对MamaLil来说，这次让她最固执的事情，恰恰是我想成为一名工程师的梦想。）可知，MamaLil拒绝在这份同意书上签字，主要是因为她不支持Bebe想成为一名工程师的愿望，故选D。【25题详解】细节理解题。根据第二段的“IhadbeenbuttingheadswithhereversinceIcouldremember.AndtheolderIgot,themoreatoddswewereandthemoreconflictsweexperienced.”（从记事起，我就一直与她作对。随着年龄的增长，我们之间的矛盾越来越多，我们经历的冲突也越来越多。）可知，Bebe和MamaLil经常吵架。故选C。【26题详解】推理判断题。根据倒数第三段“Andoneveryoneofthosetimes,IwastakenwithwhatI’dcometocallBrooklynBelle.”（每一次，我都被我称之为BrooklynBelle的东西迷住了。）和倒数第二段的“Atnight,Bellewasdressedintinylight.Onacloudlessnightlikethisone,shewasasightlikenootherinthewholecity.Jeweledinlight.Beautiful.”（晚上，微弱的灯光洒在Belle身上。在这样一个万里无云的夜晚，她的身影在整个城市里是绝无仅有的。饰有宝石的光。美丽。）可知，通过提到“BrooklynBelle”这个名字，作者想帮助读者欣赏这座桥的美丽，故选B。【27题详解】主旨大意题。通读全文，尤其是第四段的“Itwastruethatthereweren’tmanyblackwomenengineers.ButIwantedtobuildbridgesmorethananything.”（的确，当时黑人女性工程师并不多。但我最想做的是修建桥梁。）可知，本文主要讲的是作者虽然是黑人，但是却想当工程师修建桥梁，因此本文的主题是“梦不分肤色和性别”，即Dreamsknownocolororgender，故选A。CWhenservedcauliflowerorbroccoli,somekidsturnawayinannoyance.Don’tblamethem—anewstudysuggestsspecificenzymes(酶)insaliva(唾液)mightmakethesevegetablestasteterribletosomechildren.Theseenzymes,calledcysteinelyases,areproducedbybacteriainthemouth.ThesameenzymesarealsolockedawayinthecellsofBrassicavegetableslikebroccoliandcauliflower.Whenwechewbroccoli,theseenzymesspilloutoftheirstoragecontainerswhilethoseinourmouthstarttowork.Theseenzymesbreakdownacompound(化合物)calledS-methyl-L-cysteinesulfoxide(SMCSO)inthesevegetablesandthisbreakdownprocesstransformsthecompoundintosharpsmellmolecules(分子).Previousstudiesofadultssuggestthelevelofcysteinelyaseactivityinaperson’ssalivadetermineshowmuchtheSMCSObreaksdown.This,inturn,influenceshowthesevegetablestastetoadults.Accordingtothesepaststudies,whendifferentadultsconsumebroccoli,therecanbeahugedifferenceinhowmanyunpleasantsmellsthefoodletsoffastheirsaliva-borneenzymesbreakittobits.Buttheauthorswonderedwhetherthesamedifferencecanbeseeninkids,whoareusuallymoresensitivetobitterandsourtastes.Theysuspectedthatkidswhosesalivaproducedthemostsmelly,SMCSO-sourcedcompoundswouldshowthestrongestdislikeforbroccoli.Andtheteam’snewstudyprovedtheirassumption.Whilebothadults’andkids’salivaproducedsmellycompoundswhenexposedtocauliflower,thesesmellsdidnotinfluencewhetheradultslikedthevegetable.Ontheotherhand,kidswhosesalivaproducedhighconcentrationsofthesesmellsreportedhatingcauliflowerthemost.Thenewstudyincluded98pairsofparentsandchildrenaged6to8.Aftertakingsamplesofeachparticipant’ssaliva,thescientistsmixeditintorawcauliflowerpowder.TheymeasuredtheSMCSO-sourcedsmellcompoundsletoffandfoundeachparticipant’ssalivageneratedadifferentquantityofsmells.Interestingly,thedegreeofsicklysmellproductionwassimilarbetweenparents’salivaandtheirchildren’s.Thisindicatesthatparentsandkidslikelycarrysimilarbacteriaintheirmouths,whichwouldcausethemtoproducesimilarlevelsofcysteinelyases.Oursensesoftasteandsmellarestrongestinyouth,whichmaymakekidsevenmoresensitivetothesedifferencesinflavor.Thesamepreferencepatternisnotseeninadults,whoalsoproduceplentyofbadsmells.ThissuggeststhattheadultscametotoleratethetasteofBrassicavegetables.Thefindingsagreewithpaststudiesofhowourtasteschangeovertime:wecanlearntoovercomeourdistasteforcertainfoodbyeatingitmore.28.Whatarethefirsttwoparagraphsmainlyabout?A.Thefunctionofmouthbacteria. B.Thecauseofanunpleasantflavor.C.ThefeatureofBrassicavegetables. D.Theformofenzymesinourmouth.29.Whatdopreviousstudiesindicate?A.SMCSO-breakdowndependsonvariousenzymes.B.EnzymesdeterminethetasteofBrassicavegetables,C.Individualsreleasevaryingamountsofsmellmolecules.D.Kidsproducingthemostsmellshate-broccoliparticularly.30.Whatcanweconcludefromthepassage?A.Wemightacceptsomefoodsthroughrepeatedexposure.B.Thelevelofsmellsmayaffectanadult’stastepreference.C.Parents’andtheirkids’saliva-borneenzymesdon’tmatchD.Kids’salivacouldproducehigherconcentrationsofsmells.【答案】28.B29.B30.A【解析】【导语】本文为一篇说明文，介绍了人们之所以在吃西兰花和花菜时觉得难吃是因为口腔唾液中的一种特定的酶。【28题详解】主旨大意题。根据文章第一段“Whenservedcauliflowerorbroccoli,somekidsturnawayinannoyance.Don’tblamethem—anewstudysuggestsspecificenzymesinsalivamightmakethesevegetablestasteterribletosomechildren.(当吃到花椰菜或西兰花时，一些孩子会不耐烦地走开。不要责怪他们——一项新的研究表明，唾液中的特定酶可能会让这些蔬菜对一些孩子来说味道糟糕)”及第二段“Theseenzymes,calledcysteinelyases,areproducedbybacteriainthemouth.(这些酶被称为半胱氨酸裂合酶，是由口腔中的细菌产生的)”可知，文章第一、二段解释了花菜的味道难吃的原因。故选B。【29题详解】细节理解题。根据文章第四段“TheseenzymesbreakdownacompoundcalledS-methyl-L-cysteinesulfoxide(SMCSO)inthesevegetables,andthisbreakdownprocesstransformsthecompoundintosharpsmellmolecules.Previousstudiesofadultssuggestthelevelofcysteinelyaseactivityinaperson’ssalivadetermineshowmuchtheSMCSObreaksdown.This,inturn,influenceshowthesevegetablestastetoadults.(这些酶在这些蔬菜中分解成一种叫做S-甲基-l-半胱氨酸亚砜（SMCSO）的化合物，这个分解过程将化合物转化为尖锐的气味分子。先前对成年人的研究表明，人唾液中半胱氨酸裂合酶的活性水平决定了SMCSO的分解程度。这反过来又影响了这些蔬菜对成年人的味道)”可知，之前的研究表明，酶决定了芥属植物在嘴里的味道。故选B。【30题详解】推理判断题。根据文章最后一段“Thesamepreferencepatternisnotseeninadults,whoalsoproduceplentyofbadsmells.ThissuggeststhattheadultscametotoleratethetasteofBrassicavegetables.Thefindingsagreewithpaststudiesofhowourtasteschangeovertime:wecanlearntoovercomeourdistasteforcertainfoodbyeatingitmore.(这表明，成年人开始耐受芥属植物蔬菜的味道。这一发现与过去关于我们的口味如何随时间变化的研究一致：我们可以通过多吃来克服对某种食物的厌恶)”可知，通过不断的接触，我们可能会接受某些不太喜欢的食物。故选A。DConsiderthesefacts:ThetennischampionWilliamssistersareagenerationapart,accordingtothePewResearchCenter.Venus,bornin1980,islabelled“GenX”;Serena,bornin1981,isa“millennial”.Meanwhile,DonaldTrumpandMichelleObamabothbelongtothesamegeneration.Theformerwasbornin1946whilethelatterwasbornin1964,makingthemboth“babyboomers”.Beforeyoupushthesediversepersonalitiesintogenerationalstereotypes(刻板印象),letmestopyouthere:Justdon’t.Generationlabels,althoughwidelyadoptedbythepublic,havenobasisinsocialreality.Infact,inonerecentsurvey,mostpeopledidnotidentifythecorrectgenerationforthemselves,evenwhentheywereshownalistofoptions.Thisisnotsurprisingsincethelabelsareforcedbysurveyresearchers,journalistsormarketingfirmsbeforetheidentitiestheyaresupposedtodescribeevenexist.Insteadofaskingpeoplewhichgrouptheyidentifywithandwhy,theyjustdeclarethelabelsandstartmakingpronouncementsaboutthem.That’snothowsocialidentityworks.Thepracticeofnaming“generations”basedonbirthyeargoesbackatleasttothesupposed“lost-generation”ofthelate19thcentury.Butasthetraditionslidintoanever-endingcompetitiontobethefirsttoproposethenextnamethatsticks,ithasproducedgraduallydecliningreturnstosocialscienceandthepublicunderstanding.Thesupposedboundariesbetweengenerationsarenomoremeaningfulthanthenamesthey’vebeengiven.Thereisnoresearchidentifyingtheappropriateboundariesbetweengenerations,andthereisnostatisticalbasisforrequiringthesweepingcharactertraits(特征)thatarebelievedtodefinethem.Inonearticleyoumightreadthatmillennialsare“liberallions”,“downwardlymobile”,and“distrustful”;eventhoughtheyalso“getalongwellwiththeirparents,respecttheireldersandworkwellwithcolleagues”.Ridiculous,clearly.Butwhat’stheharm?Aren’ttheselabelsjustabitoffunforwriters?Amethodtoattractreadersandawayofcommunicatinggenerationalchange,whichnoonewoulddenyisarealphenomenon?We,inacademicsocialscience,studyandteachsocialchange,butwedon’tstudyandteachtheselabelsbecausetheysimplyaren’treal.Andinsocialscience,realitystillmatters.Worsethanirrelevant,suchbaselesslabelsdrivepeopletowardstereotypingandthoughtlesscharacterjudgment.Measuringanddescribingsocialchangeisessential,anditcanbeusefultoanalyzethehistoricalperiodinwhichpeoplewerebornandraised,butdrawingrandomlinesbetweenbirthyearsandassigningnamestothemdoesn’thelp.Todaytherearelotsofgoodalternativestolabelgenerations.Wecansimplydescribepeoplebythedecadeinwhichtheywerebornanddefinegenerationalgroupsspecificallyrelatedtoaparticularissue—suchas2020schoolkids.Withthearrivalof“GenerationZ”,therehasneverbeenabettertimetogetoffthistrain.31.WhatdothefactslistedinParagraph1imply?A.Differentpeoplehavedifferentopinionsaboutgenerationlabels.B.Peoplewiththesamegenerationlabelmaynotbeofsimilarage.C.Generationalchangecanbemeasuredbygenerationlabels.D.Generationlabelsarewidelyadoptedbycelebrities.32.Theunderlinedword“sticks”inParagraph4probablymeans______.A.isunderstood B.isanalyzed C.isdescribed D.isaccepted33.Accordingtothepassage,theauthormayagreethat______.A.thegenerationlabelisaharmlessdevicewritersusetoreflectrealityB.generationboundariesaremoremeaningfulthangenerationlabelsC.assigningcharactertraitstoacertaingenerationismisguidedD.journalistsshouldfindalternativewaystojudgecharacter34.Whichofthefollowingwouldbethebesttitleforthepassage?A.Generationlabels:It’shightimetoretirethemB.Generationlabels:TheongoingdebatewillneverendC.Generationlabels:Whatdotheysayaboutwhoweare?D.Generationlabels:Expandorbridgegenerationaldifferences?【答案】31B32.D33.C34.A【解析】【分析】这是一篇说明文。主要介绍了代际标签的制定，说明代际标签具有不可靠性，给一代人贴标签，有很多好的替代选择。【31题详解】细节理解题。根据第一段“Meanwhile,DonaldTrumpandMichelleObamabothbelongtothesamegeneration.Theformerwasbornin1946whilethelatterwasbornin1964,makingthemboth“babyboomers”.”（同时，唐纳德·特朗普和米歇尔·奥巴马都属于同一代人。前者出生于1946年，而后者出生于1964年，他们都属于“婴儿潮一代”。）可知，具有同一代标签的人可能年龄不同。故选B项。【32题详解】词句猜测题。根据第四段“Butasthetraditionslidintoanever-endingcompetitiontobethefirsttoproposethenextname”（但是，随着这一传统滑向一场无休止的要成为第一个提出下一个名字的竞争，）以及“ithasproducedgraduallydecliningreturnstosocialscienceandthepublicunderstanding.”（社会科学和公众理解的回报率逐渐下降。）可知，句中thenextname指的是为下一代取的名字，即可以被接受的一个名字，推测划线单词表示“接受”，与isaccepted同义。故选D项。【33题详解】推理判断题。根据第二段“Beforeyoupushthesediversepersonalitiesintogenerationalstereotypes(刻板印象),letmestopyouthere:Justdon’t.”（在你将这些不同性格推入代际刻板印象之前，让我在这里阻止你：不要这样做。）以及第六段“We,inacademicsocialscience,studyandteachsocialchange,butwedon’tstudyandteachtheselabelsbecausetheysimplyaren’treal.Andinsocialscience,realitystillmatters.”（在学术社会科学中，我们研究和教授社会变革，但我们不研究和教授这些标签，因为它们根本不是真实的。在社会科学中，现实仍然很重要。）可知，作者不同意将不同的性格推入代际刻板印象，认为代际标签是不真实的，可能同意将性格特征分配给某一代是错误的。故选C项。【34题详解】主旨大意题。通读全文，文章主要说明了代际标签的制定以及一些代际标签制定的发展，说明了代际标签具有不可靠性，给一代人贴标签，有很多好的替代选择，所以“时代标