高中英语选择性必修一Unit 1课时作业(二)

课时作业(二)Unit1SectionⅡLearningAboutLanguageⅠ.阅读理解ADonnaStricklandwasawardedthe2018NobelPrizeinPhysicsjointlywithArthurAshkinandGérardMourou.It'sthefirsttimein55yearsthatawomanhaswonthisfamousprize,butwhyhasittakensolong?Welookatfiveotherpioneeringfemalephysicists—pastandpresent—whoactuallydeservetheprize.JocelynBellBurnellPerhapsthemostfamoussnub(冷落):then­studentBelldiscoveredthefirstradiopulsarsin1967,whenshewasaPhDstudentatCambridge.TheNobelPrizethatrecognisedthislandmarkdiscoveryin1974,however,wenttohermalesupervisor,AntonyHewish.Recentlyawardeda￡2.3millionBreakthroughPrize,whichshegaveawaytohelpunder­representedstudents,shejokedtoTheGuardian,“IfeelI'vedoneverywelloutofnotgettingaNobelPrize.”LeneHauHauisbest­knownforleadingtheresearchteamatHarvardUniversityin1999thatmanagedtoslowabeamoflight,beforemanagingtostopitcompletelyin2001.OftentoppingNobelPrizepredictionlists,could2020beHau'syear?VeraRubinRubindiscovereddarkmatterinthe1980s,openingupanewfieldofastronomy.Shediedin2016,withoutrecognitionfromthecommittee.Chien­ShiungWuWu's“Wuexperiment”helpeddisprovethe“lawofconservationofparity”.Herexperimentalworkwashelpfulbutneverhonoured,andinstead,hermalecolleagueswonthe1957NobelPrizefortheirtheoreticalworkbehindthestudy.LiseMeitnerMeitnerledgroundbreakingworkonthediscoveryofnuclearfission.However,thediscoverywasacknowledgedbythe1944NobelPrizeinChemistry,whichwaswonbyhermaleco­lead,OttoHahn.1．WhenwasthediscoveryofradiopulsarsrecognisedbytheNobel?A．In1944.B．In1967.C．In1974.D．In1980.2．WhichwomanismostlikelytowinaNobelPrizelateraccordingtothetext?A．DonnaStrickland.B．JocelynBellBurnell.C．LeneHau.D．VeraRubin.3．Whatdoweknowaboutthefivefemales?A．Thefivefemalescientistsdidwellinchemistry.B．VeraRubinhadopenedupanewfieldingeometry.C．LiseMeitner'steacherwonaNobelPrizeforherwork.D．Thefivefemalescientistshaven'tbeenawardedNobelPrize.BEverysummer,myfamilyandIvisitourrelativesinIndiaandwheneverwetravel,myparentsalwaysremindmetodrinkonlybottledorboiledwater.OnoneofmytripstoIndia,Isawchildrendrinkingwaterfromtheroadside.Iwastroubledtolearnthatmillionsofpeople,mostofthemchildrenindevelopingcountries,dieeachyearbecauseofwater­relateddiseases.LivingintheUS,Iamluckytobeabletoturnonthetapandgetpotablewater(饮用水),whileonesixthoftheworld'spopulationlacksaccesstocleanwater.Thisyear,IenteredtheDiscoveryEducation3MYoungScientistChallenge.InlateJune,IlearntthatIwasselectedasoneofthetop10nationalfinalistsofthisfamousmiddleschoolsciencecompetition.Overthesummer,IworkedwithDrJimJonza,myscientistmentor(导师)from3M,anddevelopedasystemthatusessolarenergytopurifywater.Myinventionisgreenandcost­effective,andIamlookingforwardtoimplementingthisinplacesthatareaffectedbyharmfulwaterpollution.InOctober,myfamilyandIflewto3MheadquartersinStPaul,Minnesota,wherethefinaleventwastobeheld.Forthelastchallenge,eachofushadtopresenttheinventionwehadbeenworkingonoverthesummer.Thefirstplacewinnerwouldwin$25,000,atriptoCostaRica,andthetitleofAmerica'sTopYoungScientist.Attheawardsceremony,allofuswaitedanxiouslyuntiloneofthejudges,DannyForester,startedannouncing“ThewinneroftheDiscoveryEducation3MYoungScientistChallengeis...”Youcouldhearapin(大头针)dropasheopenedthepaperwiththewinner'sname,“DeepikaKurup！”AsAmerica'sTopYoungScientist,Iwasgivenanopportunitytoshowmyinventiononnationaltelevisionanddeliverseveralpresentations.OneofthemostimportantthingsIhavelearntisthatcommunicationandteamworkarekeytosuccess.4．WhydoestheauthormentionhervisitstoIndia?A．ToexpresshergreatloveforIndia.B．Toshowtheproblemofuncleanwater.C．Toexplaintheimportanceofrelatives.D．Tocompareeasternandwesterncultures.5．Whichofthefollowingcanreplacetheunderlinedword“implementing”inParagraph2?A．Researching.B．Changing.C．Finishing.D．Using.6．HowdidtheaudiencereactasForesteropenedthepaperwiththewinner'sname?A．Theyappearedcalm.B．Theyletoutshoutsofjoy.C．Theysatquietly.D．Theydroppedpinstotheauthor.7．Howisthetextmainlyorganised?A．Inorderoftime.B．Inorderofcomplexity(复杂性)．C．Inorderofplace.D．Inorderofimportance.Ⅱ.七选五WilmaRudolphwasbornintoaverypoorfamilyintheBackwoodsofTennessee.Atfouraseverediseaseleftherwithauselessleftleg.Shehadtowearanironlegbrace.__1__Hermothertoldherthatdespitethelegbrace,shecoulddowhatevershewantedtodo.Soatnine,Wilmaremovedthelegbraceandtookthestepthedoctorstoldhershewouldnevertakenormally.Thenthisgirlwishedthatshewouldliketobetheworld'sgreatestwomanrunner.At13,sheenteredarace.Shecameinlast.__2__Everyonebeggedhertoquit!However,oneday,shecameinnexttolast.Andthentherecameadaywhenshewonarace.__3__WilmawenttoTennesseeStateUniversity,whereshemetacoachnamedEdTemple.CoachTemplesawtheindomitablespiritofthegirl,andtrainedhersowellthatshewenttotheOlympicGames.Thereshecompetedagainstthegreatestwomanrunneroftheday,aGermangirlnamedJuttaHeine.__4__Butinthe100­meterdash,WilmaRudolphwon.ShebeatJuttaagaininthe200­meterrace.Finallycamethe400­meterrelay.__5__ThefirsttworunnersonWilma'steammadeperfecthandoffswiththebaton(棒).ButwhenthethirdrunnerhandedthebatontoWilma,shewassoexcitedthatshedroppedit,andWilmasawJuttatakingoffdownthetrack.Itwasimpossiblethatanybodycouldcatchthisgirl.ButWilmadidjustthat!A．NobodyhadeverbeatenJutta.B．Thelittlegirlhadgreatnaturaltalent.C．ItwouldbeWilmaagainstJuttaonceagain.D．Nobodybelievedshecouldsucceedwithaleglikethat.E．Yetshewasfortunateinhavingamotherwhoencouragedher.F．Fromthenon,WilmaRudolphwoneveryracethatsheentered.G．Sheenteredeveryraceinhighschool,andineveryraceshecameinlast.参考答案Ⅰ.阅读理解A【语篇解读】本文是一篇说明文。文章介绍了五位开创性的女物理学家，她们在科学研究方面作出了巨大贡献，她们应该获诺贝尔奖但由于种种原因而未能获得。1．答案与解析：C细节理解题。根据JocelynBellBurnell段落中的then­studentBelldiscoveredthefirstradiopulsarsin1967,whenshewasaPhDstudentatCambridge.TheNobelPrizethatrecognisedthislandmarkdiscoveryin1974，可知射电脉冲星(radiopulsars)最初在1967年被发现，其发现被授予诺贝尔奖是在1974年。故选C项。2．答案与解析：C细节理解题。根据LeneHau段落中的OftentoppingNobelPrizepredictionlists，可知莱娜·豪经常位居诺贝尔奖预测名单榜首，她最有可能获诺贝尔奖。故选C项。3．答案与解析：D推理判断题。根据第一段总述中It'sthefirsttimein55yearsthatawomanhaswonthisfamousprize,butwhyhasittakensolong?Welookatfiveotherpioneeringfemalephysicists—pastandpresent—whoactuallydeservetheprize.可知唐娜·斯特里克兰是五十五年来第一个获诺贝尔物理学奖的女性，而文中介绍的五位女科学家都应该获得这个奖，但由于各种原因未能获奖。故选D项。B【语篇解读】这是一篇记叙文。作者去印度时发现那里的人们缺乏清洁的饮用水，由此得到启发，回国后参加了探索教育3M青年科学家挑战赛，有机会与吉姆·琼扎博士合作，开发了一个利用太阳能的净水系统。作者凭自己的发明在决赛中获奖，荣获“美国顶尖青年科学家”的称号。4．答案与解析：B推理判断题。根据第一段最后一句Iwastroubledtolearnthatmillionsofpeople,mostofthemchildrenindevelopingcountries,dieeachyearbecauseofwater­relateddiseases.可知，作者提到自己去印度的经历是为了说明人们缺乏清洁水的问题。故选B项。5．答案与解析：D词义猜测题。根据Myinventionisgreenandcost­effective可知作者有了某项发明，再由画线词后的内容可知作者希望自己的发明用到有水污染的地方，故implementing是“应用”的意思。6．答案与解析：C细节理解题。根据Youcouldhearapindropasheopenedthepaperwiththewinner'sname可知，宣布获奖名单时，你甚至可以听到大头针落地的声音。由此可知，观众都非常安静地坐着，故选C项。7．答案与解析：A推理判断题。根据全文可知，作者主要按时间顺序回顾了自己在探索教育3M青年科学家挑战赛中夺冠的经历。故选A项。Ⅱ.七选五【语篇解读】威尔玛·鲁道夫在小时候曾经得过重病，左腿失去功能。但她最终战胜了疾病，成为奥运会历史上最伟大的女子短跑运动员之一。1．答案与解析：E根据空格后句可知，她的妈妈鼓励她。故E项符合语境。2．答案与解析：G根据下文的“大家都让她放弃”可知，她一开始跑得不好。G项“她参加了高中的每一场比赛，每次都是最后一名”符合语境。3．答案与解析：F上文提到“后来有一天她赢得了比赛”。F项“从那时起，威尔玛·鲁道夫每次都赢得比赛”可承接上文。4．答案与解析：A根据下文的“但是在100米短跑中威尔玛·鲁道夫赢了”可知，所填的句子和下文是转折关系，A项“没有人能战胜尤塔”符合语境。5．答案与解析：C根据下文可知，在400米接力赛中，威尔玛和尤塔仍然是对手。C项“又是威尔玛和尤塔在此角逐”可引出下文内容。提能强化练Ⅰ.阅读理解AWhenshefirststartedlearningaboutclimatechangefromoneofherelders,FawnSharpwasinvitedonahelicopterflightovertheOlympicMountainstosurveytheMountAndersonglacier.Buttheglacierwasgone,meltedbythewarmingclimate.Sharphadadeepsenseoflosswhenshediscoveredtheglacierwasn’tthereanymore.Lossisagrowingissueforpeopleworkingandlivingonthefrontlinesofclimatechange.AndthatgaveJenniferWrenAtkinson,afull-timelecturerattheUniversityofWashingtonBothell,US,anideaforaclass.Thisterm,shetaughtstudentsontheBothellcampusabouttheemotionalburdensofenvironmentalstudies.SheusedtheexperiencesofNativeAmericantribes(部落),scientistsandactivists,andaskedher24studentstofacetherealitythatthereisnoeasyfix—that“thisissuchanintractableproblemthatthey’regoingtobedealingwithitfortherestoftheirlives”.StudentCodyDillonusedtobeaclimatescienceskeptic(怀疑论者).Thenhedidhisownreadingandresearch,andchangedhismind.Dillonwasn’tgoingintoenvironmentalwork—hewasacomputer-sciencemajor.Yet,thepotentialforaworldwideenvironmentalcatastropheseemedsorealtohimfiveyearsagothathequithisjobandbecameafull-timevolunteerforanenvironmentalgroupthatworkedonrestoration(恢复)projects.Sixmonthsintothework,hedecidedthatAtkinson’sclasswasjustwhathewaslookingfor—aplacewherehecoulddiscusshisconcernsaboutachangingclimate.Atkinsonsaidshehopedtheclasshelpedherstudentspreparethemselvesfortheamountofenvironmentallossthatwouldhappenovertheirlifetimes.“Wearealreadychangingtheplanet—somanyspeciesaregoingtobelost,displacedormassivelyimpacted,”shesaid.“Thefutureisn’tgoingtobewhattheyimagined.”1.WhydidtheauthormentionthecaseofFawnSharp?A.TolayabasisforFawnSharp’sfurtherresearch.B.ToproveFawnSharp’sworkissimilartoAtkinson’s.C.Toleadintotheissueoflosscausedbyclimatechange.D.Toshowscientists’concernabouttheMountAndersonglacier.2.What’sthemainpurposeofAtkinson’sclass?A.Toexplorehowdifferentpeopledealwithclimatechange.B.Togetstudentsmoreconcernedabouttheenvironmentalissue.C.TofindsolutionstotheenvironmentalissueofOlympicMountains.D.Toteachstudentshowtoconductresearchaboutenvironment.3.Whichofthefollowingbestexplains“intractable”underlinedinparagraph3?A.Simple.B.Difficult.C.Common. D.Interesting.4.HowdidAtkinson’sclassinfluenceDillon?A.Itmadehimworkasapart-timevolunteerforrestorationprojects.B.Itmadehimrealizeaplanet-wideclimatedisasterwouldhappen.C.Itencouragedhimtobemoreinvolvedinenvironmentalprotection.D.Itdiscouragedhimtoworkonrestorationprojectsfortheenvironment.BTosolveabigenvironmentalproblem,chemistshavebeenthinkingsmall.Reallysmall:anewminirobotwiththepurposeofhelpingcleanuptinyplasticpollutingwateracrosstheglobe.Thenewmicrorobots,eachofwhichisnobiggerthanthetipofapencil,aremagnetic(磁性的)andshapedlikefour-pointedstars.Whenthesunlightshinesonthem,theycanswiminaspecificdirection;whenthesunlightdisappears,theystopmoving.Findingapieceofplastic,theyholdontoit,producechemicalreactionsandstarttobreakitdown.TheprojectisledbychemistMartinPumera,aresearcherwhoalsostudieswaystobuildmicrorobotsattheCzechUniversityinPrague.Abouttenyearsago,henoticedthemicroplasticwaseverywhere,fromthebottomoftheoceantotheiceonthetopofmountains.Iteventurnedupindrinkingwater,bothbottledandtapwater.Justthinkabouthowmuchplasticyouencountereveryday.Itdoesn’teasilydegrade(降解),whichisabigproblem.Therefore,Pumerachosetofocusontheproblemofwaterpollutioncausedbymicroplastic.Theresearcherstestedthemicrorobotsonfourtypesofplasticinthelab.Afteraweek,allfourbegandegrading,losingbetween0.5and3percentoftheirweight,whichindicatedtheywerebreakingdown.Therobotsalsoturnedtheplastic’ssmoothsurfaceintorough.Finally,theycouldbecollectedforreusealongwiththeplasticwastewithoutcausingnewpollution.Infact,Pumerasaystheystillhavealongwaytogo.Thesemicrorobotsareunlikelytosucceedindegradingalltypesofplastics.They’llalsoneedalotoftestingtoshowthatthey’resafeinopenwaterways,suchasatsea.Buthethinksthatthesechallengescanbeovercome.Someday,themicrorobotswillplayabigroleinaworldwidecleanupeffort.5.Whatcanbelearnedaboutthenewmicrorobot?A.Itisofaroundshape.B.Itisassmallasapencil.C.Itisdrivenbysunlight.D.Itusesphysicalreaction.6.WhatinspiredPumeratodesignthemicrorobot?A.Theiceonthemountains.B.Secretsoftheoceanbottom.C.Thelackofdrinkingwater.D.Themicroplasticpollution.7.Howdoesamicrorobotdealwiththeplastic?A.Collectingitforreuse.B.Makingitssurfacesmooth.C.Absorbingitcompletely.D.Breakingitdowntosomeextent.8.WhatisPumera’sattitudetotheirfutureresearch?A.Doubtful. B.Confident.C.Regretful. D.Critical.Ⅱ.七选五(2023湖南长沙长郡中学模拟)Humanbodieswereactuallydesignedforwalking,awonderfulformofexerciseatnocost.It’skindtoourbodiesandgreatforourwaistlines.1

Probablyyoualreadylovetowalk,butyou’regettingboredoftracingthesameoldroutedayafterday,ormaybeyou’renewtowalkingandaren’tsurehowtogetstarted.2Askyourself,whatdoyouwanttogetoutofwalkingasidefromthehealthbenefits?Doyouwanttomeetotherpeople?Seenewplaces?Getoutintothecountrysideorexploreanewcity?Knowingyourgoalswillhelpyoudecideonthetypeofwalkyouwanttodo.

Callupyourfriendsandschedulewalkswiththemifsocializingisyouraim.3Manymallshavegroupsthatcomeeveryday,oreveryweekend,to“walkthemall”.Thesegroupsarealwayshappytoincludeonemorewalker!

4Manylargecitieshaveincrediblegardensandparksthatincludequietwalkingtrailsgettingyouoffthebeatenpath.ThankstotheRailstoTrailsprogram,railwaysacrossthecountryarebeingtransformedintoscenicwalkingpathsthatareaperfectwaytoseekcalmness.

Fromthebenefitstoyourhearttoyouroverallhappiness,walkingisjustplaingoodforyou.5It’safantasticwaytogettoknowaplacebythepowerofyourowntwofeet.

A.Thismonth,pickupamapandstartwalking.B.Askyourfriendswheretheyliketowalkandjustgothere.C.Youmayaswellconsiderheadingtoanewcityforachange.D.Eitherway,it’stimetoaccepttheideaofwalkingwithapurpose.E.Recently,sciencehasprovedthatwalkingisgoodforyourbodyshape.F.Andbestofall,it’sagreatwaytoseenewthingsandmeetnewpeople!G.Ifyou’reafterwalkingalone,askaboutlocalhikesthatgetyouawayfromthecrowd.Ⅲ.完形填空InanationalspellingcontestinAmerica,an11-year-oldgirlwasaskedtospellacertainword.Butwithher1voice,thejudgeswerenotsurewhethershespelledtherightword.Theytalkeditoverand2decidedtosimplyaskherwhatshehadsaid.Bythen,thegirlknewshehadmisspelledtheword.Insteadoflying,shetoldthetruththatshehadsaidthe3letter—soshelostthecontest.

Asthegirlwalkedoffthe4,theentireaudiencestood,clappingtoapplaudherhonesty.Later,dozensofnewspaperreporterswroteaboutthis5,eventhoughitcostthegirlthecontest.Butthefactisthatshe6thebiggestcontestthatday:thecontestofhercharacter.

Probablythebiggesttestofourcharacterandhonestyiswhatwewoulddoifweknewwewouldneverget7.Thisyounggirlcouldeasilyhave8andnobodywouldhaveknownitbutherself.Butit’sbeensaidthatifyou9,youmakeyourselfcheap.Thisyounggirlwas10enoughtoprizeherowncharactermorethantheprizefromaspellingcontest.Sheknewthe11shemadeinthatmomentwillhavealong-lastinginfluenceonherfuture.

Shouldthewallet,foundinthestreet,beputintoapocketor12tothepoliceman?Shouldthe13changereceivedatthestorebeforgottenor14?Nobodywillknow.Butwehavetolivewithourselves,anditisalwaysbettertolivewithsomeonewe15.

1.A.high B.sweetC.tough D.soft2.A.finally B.seriouslyC.secretly D.totally3.A.correct B.wrongC.different D.same4.A.stage B.studioC.test D.classroom5.A.lesson B.storyC.courage D.accident6.A.achieved B.brokeC.won D.defeated7.A.paid B.awardedC.reported D.caught8.A.escaped B.liedC.changed D.answered9.A.accept B.fightC.cheat D.insist10.A.smart B.generousC.energetic D.interested11.A.plan B.conclusionC.discovery D.choice12.A.turnedover B.putawayC.setaside D.takendown13.A.small B.someC.extra D.necessary14.A.ignored B.paidC.shared D.returned15.A.protect B.challengeC.respect D.attackⅣ.语法填空(2022全国甲卷)Avisually-challengedmanfromBeijingrecentlyhiked(徒步)40daystoXi’an,asafirststep1.(journey)theBeltandRoadroute(路线)byfoot.

Onthe1,100-kilometerjourney,themanCaoShengkang,2.losthiseyesightattheageofeightinacaraccident,crossed40citiesandcountiesinthreeprovinces.InspiredbytheBeltandRoadForumforInternationalCooperation3.(hold)inBeijing,Caodecidedtocovertheroutebyhikingasatribute(致敬)totheancientSilkRoad.4.friendofhis,WuFan,volunteeredtobehiscompanionduringthetrip.

CaoandWualsocollectedgarbagealongtheroad,inordertopromoteenvironmental5.(protect).Caobelievesthiswillmakethehikingtripevenmore6.(meaning).Thetwoofthemcollectedmorethan1,000plasticbottlesalongthe40-dayjourney.

Inthelastfiveyears,Cao7.(walk)through34countriesinsixcontinents,andin2016,hereachedthetopofKilimanjaro,Africa’s8.(high)mountain.

Now,CaohasstartedthesecondpartofhisdreamtowalkalongtheBeltandRoadroute.Heflew4,700kilometers9.Xi’antoKashgaronSept.20,10. (plan)tohikebacktoXi’aninfivemonths.

参考答案UNIT1提能强化练Ⅰ.【语篇导读】本文是一篇记叙文。FawnSharp通过一次搭乘直升机飞行的经历认识到了冰川融化和环境污染问题的严重性;同时JenniferWrenAtkinson决定给学生开设课程,教学生如何面对环境污染,让更多的学生关注环境问题。1.C推理判断题。通读第一段可知,FawnSharp在一次直升机飞行中意识到气候变化导致了冰川融化。由此可推知,作者在第一段中提及FawnSharp的例子是为了引出下文气候变化导致环境问题的话题。2.B细节理解题。根据第二段内容可知,由于气候变化引起环境问题,她产生了在大学开设环境保护课程的想法。由此可知,Atkinson开设课程的目的是让学生更加关注环境问题。3.B词义猜测题。根据画线词上文“noeasyfix”以及下文的“they’regoingtobedealingwithitfortherestoftheirlives”可知,这是一个十分困难的问题,以至于学生们要用他们的余生来解决它。4.C推理判断题。根据倒数第三段“Sixmonthsintothework...discusshisconcernsaboutachangingclimate.”可知,Dillon在环保组织做了六个月志愿者之后,他认为在Atkinson的课堂上他可以讨论他对气候变化的担忧。由此可推知,Atkinson的课鼓励Dillon更多地参与到环境保护中。【语篇导读】本文是一篇说明文。本文主要介绍了一种新型微型机器人,它可以帮助清理污染水道的塑料碎片。5.C细节理解题。由第二段中的“Whenthesunlightshinesonthem,theycanswiminaspecificdirection;whenthesunlightdisappears,theystopmoving.”可知,新型微型机器人是由阳光驱动的。故选C项。6.D细节理解题。由第三段中的“Abouttenyearsago,henoticed...easilydegrade,whichisabigproblem.Therefore,Pumerachosetofocusontheproblemofwaterpollutioncausedbymicroplastic.”可知,微塑料不容易降解,无处不在。微塑料污染给环境带来了挑战,这是吸引Pumera从事该项研究的原因之一。由此可知,微塑料污染激发了Pumera设计微型机器人的灵感。故选D项。7.D细节理解题。由第四段中的“Theresearcherstestedthemicrorobotsonfourtypesofplasticinthelab.Afteraweek,allfourbegandegrading,losingbetween0.5and3percentoftheirweight,whichindicatedtheywerebreakingdown.”可知,仅一周时间,塑料的重量减轻,这说明微型机器人可以在某种程度上分解塑料。故选D项。8.B推理判断题。由最后一段中的“Buthethinksthatthesechallengescanbeovercome.Someday,themicrorobotswillplayabigroleinaworldwidecleanupeffort.”可知,Pumera认为,研究中的这些挑战是可以克服的,微型机器人在未来将发挥重要作用。由此可知,他对未来的研究很有信心。故选B项。Ⅱ.【语篇导读】本文是一篇说明文。文章主要说明了散步对人的一些好处,以及如何选择散步路线的建议。从对心脏的好处到对整体的快乐,散步是非常好的。文章最后倡导人们开始散步。1.F根据上文“Humanbodieswereactuallydesignedforwalking,awonderfulformofexerciseatnocost.”可知,本句承接上文继续说明散步的好处。故F项符合上下文语境。2.D结合下文“Ask