高中英语学科知识考点单选题100道及答案

高中英语学科知识考点单选题100道及答案1.—IwonderifIcoulduseyourcomputerthisafternoon.—______.I'mnotusingitanyhow.A.ComeonB.ItdependsC.GoaheadD.That'sgreat答案：C解析：根据回答者说自己反正不用电脑，“Goahead”表示同意对方使用，符合语境。“Comeon”有加油等意思；“Itdepends”表示看情况；“That'sgreat”表示那很棒，均不符合。2.ThenewstadiumbeingbuiltforthenextAsianGameswillbe______thepresentone.A.asthreetimesbigasB.threetimesasbigasC.asbigasthreetimesD.asbigthreetimesas答案：B解析：表达倍数的常用结构是“倍数+as+形容词/副词原级+as”，所以“三倍大”是“threetimesasbigas”。3.Itwasinthevillage______heoncelived______hegothisjunioreducation.A.that;whereB.where;thatC.which;whereD.where;which答案：B解析：第一个空“whereheoncelived”是定语从句，修饰先行词“village”；第二个空是强调句结构“Itis/was...that...”，强调地点状语“inthevillage”。4.Withalotofdifficultproblems______,thenewly-electedpresidentishavingahardtime.A.settledB.settlingC.tosettleD.beingsettled答案：C解析：“Withalotofdifficultproblemstosettle”表示有很多难题要去解决，这里用不定式作宾语补足语，说明问题还未解决，要去做。5.______thewebsiteoftheFireDepartmentinyourcity,andyouwilllearnalotaboutfirefighting.A.HavingsearchedB.TosearchC.SearchD.Searching答案：C解析：这是“祈使句+and+陈述句”的结构，祈使句以动词原形开头，所以用“Search”。6.TheoldmanaskedLucytomovetoanotherchair______hewantedtositnexttohiswife.A.althoughB.unlessC.becauseD.if答案：C解析：前后句是因果关系，老人让Lucy换椅子是因为他想坐在妻子旁边，所以用“because”。7.Ihaven'tseenAnnfor______longthatI'veforgottenwhatshelookslike.A.suchB.veryC.soD.too答案：C解析：“so...that...”表示“如此……以至于……”，“so”后接形容词或副词，“such”后接名词，这里“long”是形容词，所以用“so”。8.—Howlongdoyouthinkitwillbe______Chinasendsamannedspaceshiptothemoon?—Perhapstwoorthreeyears.A.whenB.untilC.thatD.before答案：D解析：“Itwillbe+一段时间+before...”表示“要过多久才……”，符合语境。9.Thefamouswriterissaidto______anothernewbookinthepasttwoyears.A.finishB.havefinishedC.befinishingD.havingfinished答案：B解析：“issaidtohavedone”表示据说已经做了某事，“inthepasttwoyears”是现在完成时的时间标志，所以用“havefinished”。10.—______yougotintouchwithMr.Smith?—Throughafriendofmine.A.HowwasitthatB.HowitwasthatC.WasithowthatD.Wasitthathow答案：A解析：这是对方式状语提问的强调句的特殊疑问句形式，结构是“特殊疑问词+is/wasitthat+其他部分”，所以选A。11.Theproblem______atthemeetingyesterdayisveryimportant.A.beingdiscussedB.discussedC.tobediscussedD.discussing答案：B解析：“problem”和“discuss”是被动关系，且“yesterday”表明动作已经发生，所以用过去分词“discussed”作后置定语。12.Hemadeapromise______hewouldhelpme.A.whatB.whichC.thatD.whether答案：C解析：“thathewouldhelpme”是同位语从句，解释说明“promise”的内容，且从句不缺成分，用“that”引导。13.______withsomuchtrouble,wefailedtocompletethetaskontime.A.FacingB.FaceC.FacedD.Toface答案：C解析：“befacedwith”表示“面临”，这里用过去分词“Faced”作状语，相当于“Becausewewerefacedwith...”。14.I'dliketostartmyownbusiness—That's______I'ddoifIhadthemoney.A.whatB.whichC.whyD.how答案：A解析：“what”引导表语从句，在从句中作“do”的宾语，表示“我有了钱会做的事情”。15.Theteacher,with6girlsand8boysofherclass,______visitingamuseumwhentheearthquakestruck.A.wasB.wereC.hadbeenD.wouldbe答案：A解析：当主语后面跟有“with”连接的短语时，谓语动词与前面的主语“theteacher”保持一致，用单数，“whentheearthquakestruck”表明是过去进行时，所以用“was”。16.______bythebeautyofnature,thegirlfromLondondecidedtospendanothertwodaysonthefarm.A.AttractingB.AttractedC.TobeattractedD.Havingattracted答案：B解析：“thegirl”和“attract”是被动关系，用过去分词“Attracted”作原因状语，相当于“Becauseshewasattractedby...”。17.—Doyouknowourtownatall?—No,thisisthefirsttimeI______here.A.wasB.havebeenC.cameD.amcoming答案：B解析：“Thisisthefirsttime+that从句”中，从句要用现在完成时，所以是“havebeen”。18.Youcan'timaginewhatdifficultywehad______homeinthesnowstorm.A.walkedB.walkC.towalkD.walking答案：D解析：“havedifficulty(in)doingsth.”表示“做某事有困难”，所以用“walking”。19.—DidyoutellJuliaabouttheresult?—Oh,no,Iforgot.I______hernow.A.willbecallingB.willcallC.callD.amtocall答案：B解析：“will+动词原形”可以表示临时决定做某事，这里因为忘了告诉Julia结果，现在临时决定打电话给她，用“willcall”。20.______isknowntousallisthatthe2022WinterOlympicswillbeheldinBeijing.A.ItB.WhatC.AsD.Which答案：B解析：“Whatisknowntousall”是主语从句，“what”在从句中作主语，引导主语从句，整个句子是“主系表”结构。21.Thenumberofpeopleinvited______fifty,butanumberofthem______absentfordifferentreasons.A.were;wasB.was;wasC.was;wereD.were;were答案：C解析：“thenumberof”表示“……的数量”，作主语时谓语动词用单数；“anumberof”表示“许多”，作主语时谓语动词用复数，所以选C。22.Itisreportedthatmanyanewhouse______atpresentinthedisasterarea.A.arebeingbuiltB.werebeingbuiltC.wasbeingbuiltD.isbeingbuilt答案：D解析：“manya+单数名词”作主语时，谓语动词用单数，“atpresent”表明是现在进行时的被动语态，所以用“isbeingbuilt”。23.Hehasgothimselfintoadangeroussituation______heislikelytolosecontrolovertheplane.A.whereB.whichC.whileD.why答案：A解析：“whereheislikelytolosecontrolovertheplane”是定语从句，修饰先行词“situation”，在从句中作地点状语，所以用“where”。24.Thefacthasworriedmanyscientists______theearthisbecomingwarmerandwarmertheseyears.A.whatB.whichC.thatD.though答案：C解析：“thattheearthisbecomingwarmerandwarmertheseyears”是同位语从句，解释说明“fact”的内容，且从句不缺成分，用“that”引导。25.—I'msorryIsteppedoutsideforasmoke.Iwasverytired.—Thereisno______forthiswhileyouareonduty.A.reasonB.excuseC.causeD.explanation答案：B解析：“excuse”强调为自己的行为找借口，这里值班时出去抽烟用“excuse”合适；“reason”强调原因；“cause”强调起因；“explanation”强调解释。26.______hissurprise,thelittlegirlwasabletorecitesomanyancientpoems.A.InB.ToC.AtD.For答案：B解析：“toone'ssurprise”是固定短语，表示“令某人惊讶的是”。27.Themanagerhasgotagoodbusiness______sothecompanyisdoingwell.A.ideaB.senseC.thoughtD.thinking答案：B解析：“businesssense”表示“商业头脑”，符合语境；“idea”强调想法；“thought”强调思想；“thinking”强调思考。28.Hefounditincreasinglydifficulttoread,______hiseyesightwasbeginningtofail.A.thoughB.forC.butD.so答案：B解析：“for”在这里表示原因，说明他阅读越来越困难的原因是视力开始下降。“though”表示转折；“but”表示转折；“so”表示结果。29.ThedoctoradvisedVerastronglythatsheshouldtakeaholiday,but______didn'thelp.A.itB.sheC.whichD.he答案：A解析：“it”指代前面医生建议Vera度假这件事，“which”不能用于并列句中；“she”和“he”指代人，不符合。30.Theresearchissodesignedthatonce______nothingcanbedonetochangeit.A.beginsB.havingbegunC.beginningD.begun答案：D解析：“oncebegun”是“onceitisbegun”的省略形式，“research”和“begin”是被动关系，所以用过去分词。31.—Isthereanypossibility______youcouldpickmeupattheairport?—Noproblem.A.whenB.thatC.whetherD.what答案：B解析：“thatyoucouldpickmeupattheairport”是同位语从句，解释说明“possibility”的内容，且从句不缺成分，用“that”引导。32.Theflowershisfriendgavehimwilldieunless______everyday.A.wateredB.wateringC.waterD.towater答案：A解析：“unlesswatered”是“unlesstheyarewatered”的省略形式，“flowers”和“water”是被动关系，所以用过去分词。33.Iwasoutoftownatthetime,soIdon'tknowexactlyhowit______.A.washappeningB.happenedC.happensD.hashappened答案：B解析：根据“atthetime”可知事情发生在过去，用一般过去时“happened”。34.Thelittleboywon'tgotosleep______hismothertellshimastory.A.orB.unlessC.butD.whether答案：B解析：“unless”表示“除非”，小男孩除非妈妈给他讲故事否则就不睡觉，符合语境。“or”表示或者；“but”表示转折；“whether”表示是否。35.—I'mafraidMr.Woodcan'tseeyouuntil4o'clock.—Oh,______Iwon'twait.A.nodoubtB.afterallC.inthatcaseD.inthisway答案：C解析：“inthatcase”表示“既然那样”，符合语境。“nodoubt”表示毫无疑问；“afterall”表示毕竟；“inthisway”表示用这种方法。36.______theprojectasplanned,we'llhavetoworktwomorehoursaday.A.CompletingB.CompleteC.CompletedD.Tocomplete答案：D解析：“Tocompletetheprojectasplanned”是不定式作目的状语，表示为了按计划完成项目。37.It'sthefirsttimethathehasbeentoAustralia,______?A.isn'theB.hasn'theC.isn'titD.hasn'tit答案：C解析：“It'sthefirsttimethat...”结构的反意疑问句，反问部分用“isn'tit”。38.Thebook,______isblue,ismine.A.whosecoverB.thecoverofwhichC.ofwhichthecoverD.alloftheabove答案：D解析：A选项“whosecover”表示书的封面；B选项“thecoverofwhich”；C选项“ofwhichthecover”都可以用来引导定语从句修饰先行词“book”，表示书的封面是蓝色的。39.Shelooksforwardeveryspringto______theflower-linedgarden.A.visitB.payingavisitC.walkinD.walkingin答案：D解析：“lookforwardto”中“to”是介词，后面接动词-ing形式，“walkin”表示走进，符合语境，“payavisitto”后面要接宾语。40.Itiswhatyoudoratherthanwhatyousay______matters.A.thatB.whatC.whichD.this答案：A解析：这是强调句结构“Itis/was...that...”，强调“whatyoudoratherthanwhatyousay”。41.Theweatherturnedouttobefineyesterday.I______thetroubletocarrymyumbrellawithme.A.shouldhavetakenB.couldhavetakenC.needn'thavetakenD.mustn'thavetaken答案：C解析：“needn'thavedone”表示本不必做某事而做了，天气好，本不必带伞却带了，符合语境。“shouldhavedone”表示本应该做某事；“couldhavedone”表示本能够做某事；“mustn'thavedone”表达错误。42.—DoyoumindifIopenthewindow?—______.I'vegotacold.A.NevermindB.You'dbetternotC.NotatallD.Allright答案：B解析：根据回答者说自己感冒了，可知不希望对方开窗，“You'dbetternot”表示你最好不要，符合语境。“Nevermind”表示没关系；“Notatall”表示一点也不；“Allright”表示好的。43.______fromspace,theearthlookslikeablueball.A.SeenB.SeeingC.ToseeD.See答案：A解析：“theearth”和“see”是被动关系，用过去分词“Seen”作状语，相当于“Whenitisseenfromspace”。44.Theprofessorgaveusanotherwonderfultalk,______welearnedalot.A.whichB.fromwhichC.thatD.ofwhich答案：B解析：“fromwhichwelearnedalot”是定语从句，“learnfrom”是固定搭配，这里“which”指代先行词“talk”。45.Hewasabouttotellmethesecret______someonepattedhimontheshoulder.A.asB.untilC.whileD.when答案：D解析：“beabouttodo...when...”是固定结构，表示“正要做某事，这时……”，所以用“when”。46.—CanIhaveadayofftomorrow,Mr.Johnson?—______.Icanmanagewithoutyou.A.ForgetitB.I'mafraidnotC.ItdependsD.Ofcourse答案：D解析：根据回答者说没有对方也能应付，说明同意对方请假，“Ofcourse”表示当然可以，符合语境。“Forgetit”表示算了；“I'mafraidnot”表示恐怕不行；“Itdepends”表示看情况。47.______isoftenthecase,wehaveworkedouttheproductionplan.A.WhichB.WhenC.WhatD.As答案：D解析：“Asisoftenthecase”是固定用法，“as”引导非限定性定语从句，可置于句首，指代后面整个句子内容。48.Thenews______ourteamhaswonthegameistrue.A.whichB.thatC.whatD.whether答案：B解析：“thatourteamhaswonthegame”是同位语从句，解释说明“news”的内容，且从句不缺成分，用“that”引导。49.Idon'tthinkheisright,______?A.isheB.isn'theC.doID.don'tI答案：A解析：当主句是“Idon'tthink/suppose/believe等+宾语从句”时，反意疑问句要和从句的主语和谓语保持一致，且要根据否定转移来判断，这里从句否定，所以用“ishe”。50.Wearelivinginanage______manythingsaredoneontheInternet.A.whichB.thatC.whoseD.when答案：D解析：“whenmanythingsaredoneontheInternet”是定语从句，修饰先行词“age”，在从句中作时间状语，所以用“when”。51.Thequestion______attomorrow'smeetingisveryimportant.A.todiscussB.beingdiscussedC.tobediscussedD.discussing答案：C解析：“tobediscussed”表示将来要被讨论，“tomorrow'smeeting”表明是将来的时间，“question”和“discuss”是被动关系，所以用“tobediscussed”作后置定语。52.______inaheavytrafficjamisquiteanunpleasantexperience.A.CaughtB.HavingcaughtC.BeingcaughtD.Tocatch答案：C解析：“Beingcaughtinaheavytrafficjam”是动名词短语作主语，“becaughtin”表示陷入，“being”体现动名词的被动和进行。53.Heistheonlyoneofthestudentswho______awinnerofscholarshipforthreeyears.A.isB.areC.havebeenD.hasbeen答案：D解析：“theonlyoneof+复数名词+定语从句”中，定语从句的谓语动词和“theonlyone”保持一致，用单数，“forthreeyears”是现在完成时的时间标志，所以用“hasbeen”。54.—I'dliketoinviteyoutodinnerthisSaturday,Mr.Smith.—______.A.Oh,no.Let'snotB.I'dratherstayathomeC.I'mverysorry,butIhaveotherplansD.Thankyou答案：C解析：对于别人的邀请，委婉拒绝用“C”选项，说明自己有其他计划。“A”选项太直接生硬；“B”选项不太礼貌；“D”选项没有明确回应是否接受邀请。55.Itisonethingtoenjoylisteningtogoodmusic,butitisquite______toperformskillfullyyourself.A.otherB.anotherC.someD.any答案：B解析：“one...another...”表示一个……另一个……，这里说听音乐是一回事，自己熟练表演又是另一回事，用“another”。56.______theproblemmoreclearly,theycalledforameeting.A.SoastosolveB.InordertosolveC.SothattosolveD.Inorderthatsolve答案：B解析：“Inorderto”可以置于句首或句中，“Soasto”不能置于句首，“Sothat”和“Inorderthat”后面接从句，所以选“B”。57.Thereason______hewaslateis______hemissedtheearlybus.A.why;thatB.that;whyC.for;thatD.why;because答案：A解析：“whyhewaslate”是定语从句，修饰先行词“reason”；“thathemissedtheearlybus”是表语从句，“thereason...isthat...”是固定结构。58.Theteacheraswellasthestudents______interestedintheactivity.A.isB.areC.hasD.have答案：A解析：当主语后面跟有“aswellas”连接的短语时，谓语动词与前面的主语“theteacher”保持一致，用单数，“beinterestedin”表示对……感兴趣，所以用“is”。59.______you'vegotachance,youmightaswellmakefulluseofit.A.NowthatB.AfterC.AlthoughD.Assoonas答案：A解析：“Nowthat”表示既然，既然你有了机会，不妨充分利用，符合语境。“After”表示在……之后；“Although”表示虽然；“Assoonas”表示一……就……。60.Thenoveliswell-worth______.Iplan______one.A.reading;tobuyB.toread;buyingC.reading;buyingD.toread;tobuy答案：A解析：“beworthdoing”表示值得做某事；“plantodosth.”表示计划做某事，所以选“A”。61.Wewereswimminginthelake______suddenlythestormstarted.A.whenB.whileC.untilD.before答案：A解析：“when”表示“这时，突然”，常用于“bedoing...when...”结构，这里表示我们正在湖里游泳，这时突然暴风雨来了。“while”强调动作的同时性且常接延续性动词；“until”表示直到；“before”表示在……之前。62.Theroomwassoquietthatshecouldhearthe______ofherheart.A.hittingB.beatingC.hurtingD.striking答案：B解析：“thebeatingofone'sheart”表示心脏的跳动，“beat”可用于表示心脏等有规律的跳动。“hit”强调击打；“hurt”强调伤害；“strike”强调打击、罢工等。63.Itwasnotuntilmidnight______theyreachedthecampsite.A.thatB.whenC.whileD.as答案：A解析：这是强调句结构“Itwasnotuntil...that...”，强调时间状语“untilmidnight”。64.______noneed______theradioasI'musedtostudyingwithiton.A.It's;toturndownB.It's;turningupC.There's;toturnoffD.There's;turningoff答案：C解析：“There'snoneedtodosth.”表示没有必要做某事，根据“asI'musedtostudyingwithiton”可知没必要关掉收音机，所以用“toturnoff”。65.Thegirl______yousawinthestreetisMary.A.thatB.whoseC.whichD.as答案：A解析：“thatyousawinthestreet”是定语从句，修饰先行词“girl”，“that”在从句中作宾语，指人可以用“that”引导。“whose”表示所属关系；“which”指物；“as”引导定语从句有一些特殊用法，这里不适用。66.Hedidn'tattendthemeeting,______madehisbossveryangry.A.whatB.whichC.thatD.it答案：B解析：“whichmadehisbossveryangry”是非限定性定语从句，“which”指代前面整个句子内容，“what”不能引导定语从句；“that”不能用于非限定性定语从句；“it”不能引导从句。67.Thenumberofpeoplewho______carsoftheirownisincreasing.A.hasB.haveC.thereisD.thereare答案：B解析：“whohavecarsoftheirown”是定语从句，修饰先行词“people”，从句谓语动词和“people”保持一致，用复数“have”。68.______withthesizeofthewholeearth,thebiggestoceandoesn'tseembigatall.A.CompareB.WhencomparingC.ComparingD.Whencompared答案：D解析：“Whencomparedwith...”是“whenitiscomparedwith...”的省略形式，“ocean”和“compare”是被动关系，所以用过去分词。69.Hetalkedalotaboutthingsandpersons______theyrememberedintheschool.A.whichB.thatC.whomD.what答案：B解析：当先行词既有人又有物时，定语从句用“that”引导，这里“thingsandpersons”是先行词，所以用“that”。70.Wemustdosomethingtopreventtherivers______.A.pollutingB.beingpollutedC.frompollutingD.tobepolluted答案：B解析：“prevent...fromdoing...”中，“rivers”和“pollute”是被动关系，“from”可以省略，所以用“beingpolluted”。71.Idon'tthinkitadvisablethatTom______tothejobsincehehasnoexperience.A.isassignedB.willbeassignedC.beassignedD.hasbeenassigned答案：C解析：在“itisadvisablethat...”结构中，从句要用虚拟语气，即“should+动词原形”，“should”可以省略，“Tom”和“assign”是被动关系，所以用“beassigned”。72.—Howaboutgoingoutforawalk?—______.A.IlikeitB.I'lllikeitC.I'dlikeitD.I'dliketo答案：D解析：对于别人的提议表示愿意去做，用“I'dliketo”，完整形式是“I'dliketogooutforawalk”，省略了后面重复的内容。73.Theoldman______lastweekisascientist.A.IspokeB.IspoketoC.whomIspokeD.thatIspoke答案：B解析：“Ispoketo”是定语从句，修饰先行词“oldman”，“speaktosb.”是固定搭配，关系代词“whom”或“that”在从句中作宾语可省略。74.______ismentionedabove,thenumberofthestudentsinseniorhighschoolsisincreasing.A.WhichB.AsC.ThatD.It答案：B解析：“Asismentionedabove”是固定用法，“as”引导非限定性定语从句，可置于句首，指代后面整个句子内容。75.Hefoundthestreetmuch______.A.crowdB.crowdedC.crowdingD.crowdly答案：B解析：“crowded”是形容词，作宾语补足语，说明“street”的状态，“crowd”是名词或动词；“crowding”是现在分词；“crowdly”不是正确的单词。76.Thefilmbroughtthehoursbacktome______Iwastakengoodcareofinthatfar-awayvillage.A.untilB.thatC.whenD.where答案：C解析：“whenIwastakengoodcareofinthatfar-awayvillage”是定语从句，修饰先行词“hours”，在从句中作时间状语，所以用“when”。77.Weallthink______necessarytostopschoolbullying.A.itB.thatC.thisD.its答案：A解析：“it”作形式宾语，真正的宾语是“tostopschoolbullying”，“thinkit+形容词/名词+todosth.”是常用结构。78.______inthought,healmostranintothecarinfrontofhim.A.LosingB.HavinglostC.LostD.Tolose答案：C解析：“belostinthought”表示陷入沉思，这里用过去分词“Lost”作状语，相当于“Becausehewaslostinthought”。79.—Wouldyoulikesomemorecoffee?—______,please.A.NomoreB.JustalittleC.I'vehadenoughD.Yes,Iwould答案：B解析：根据回答“please”可知接受了对方的提议，“Justalittle”表示只要一点，符合语境。“Nomore”表示不再要了；“I'vehadenough”表示我已经够了；“Yes,Iwould”表达错误，应该是“Yes,I'dliketo”。80.Theway______hediditwasdifferentfromwhatwewereusedto.A.inthatB.inwhichC.whichD.what答案：B解析：“inwhichhedidit”是定语从句，修饰先行词“way”，“theway”作先行词时，定语从句可以用“inwhich”或“that”引导，也可以省略关系词。81.Thebookisworthy______.A.readingB.ofbeingreadC.toreadD.toberead答案：B解析：“beworthyofbeingdone”或“beworthytobedone”都表示值得被做，“Thebook”和“read”是被动关系，所以“ofbeingread”符合要求。82.—Whatdoyouthinkoftheconcert?—Ireallyenjoyit.Ididn'texpectitwas______wonderful.A.asB.moreC.mostD.very答案：A解析：“as+形容词原级+as”表示和……一样，这里“aswonderful”表示没想到音乐会如此精彩，省略了后面的比较对象。83.Thelittleboyisdirtyfromheadtofootbecausehe______inthemudallthemorning.A.hasplayedB.isplayingC.hasbeenplayingD.wasplaying答案：C解析：“allthemorning”表示整个上午一直在进行的动作，用现在完成进行时“hasbeenplaying”，强调动作从过去一直持续到现在还在进行。84.—______isthepopulationofyourcity?—Abouttwomillion.A.HowmanyB.HowmuchC.WhatD.Which答案：C解析：询问人口数量用“Whatisthepopulationof...?”。85.I'llneverforgetthedays______wespenttogetherinthecountryside.A.whenB.thatC.onwhichD.inwhich答案：B解析：“thatwespenttogetherinthecountryside”是定语从句，修饰先行词“days”，“that”在从句中作“spent”的宾语，“when”在从句中作时间状语，这里不符合；“onwhich”和“inwhich”相当于“when”。86.Thedoctorrecommendedthathe______afewmoredaysinhospital.A.staysB.tostayC.stayD.wouldstay答案：C解析：在“recommendthat...”结构中，从句要用虚拟语气，即“should+动词原形”，“should”可以省略，所以用“stay”。87.Hehastwosons,______workaschemists.A.twoofwhomB.bothofwhomC.bothofwhichD.allofwhom答案：B解析：“bothofwhomworkaschemists”是非限定性定语从句，“whom”指代先行词“sons”，“both”用于两者，“all”用于三者或三者以上，“which”指物，所以选“B”。88.Theproblem______nowisveryserious.A.discussedB.beingdiscussedC.tobediscussedD.discussing答案：B解析：“beingdiscussed”表示正在被讨论，“now”表明是现在正在进行的动作，“problem”和“discuss”是被动关系，所以用“beingdiscussed”作后置定语。89.—Doyouknowthegirl______isstandingunderthetree?—Yes,sheismyclassmate.A.whoB.whomC.whoseD.which答案：A解析：“whoisstandingunderthetree”是定语从句，修饰先行词“girl”，“who”在从句中作主语，指人可以用“who”引导。“whom”在从句中作宾语；“whose”表示所属关