22.Thefactthatsomanypeoplestillsmokeinpublicplaces

thatwemayneedanationwidecampaigntoraiseawarenessoftherisksofsmoking.(2011江蘇卷）A.suggest B.suggestsC.suggested D.suggesting【解析】考查時(shí)態(tài)及主謂一致。句意：仍有許多人在公共場(chǎng)合抽煙，這個(gè)事實(shí)表明我們需要一場(chǎng)全國(guó)性的運(yùn)動(dòng)來(lái)增強(qiáng)抽煙有害健康的意識(shí)?！敬鸢浮緽35.Allthescientificevidence

thatincreasinguseofchemicalsinfarming

damagingourhealth.(2012湖南卷）A.show;are B.shows;areC.show;is D.shows;is【解析】句意：所有的科學(xué)證據(jù)表明：農(nóng)業(yè)方面越來(lái)越多的使用化學(xué)物質(zhì)正在損害著我們的健康。主語(yǔ)是evidence“證據(jù)（不可數(shù)名詞）”，所以謂語(yǔ)動(dòng)詞應(yīng)用單數(shù)式shows，賓語(yǔ)從句的主語(yǔ)是use“使用（不可數(shù)名詞）”，所以要用is?！敬鸢浮緿主謂一致AGREEMENTUsefulstructures語(yǔ)法詳解：所謂主謂一致是指主語(yǔ)和謂語(yǔ)動(dòng)詞之間,即主語(yǔ)的人稱和單復(fù)數(shù)形式?jīng)Q定著謂語(yǔ)動(dòng)詞對(duì)應(yīng)的形式。Theboy___diving.They____diving.BothJackandTim___diving.Allofthem____diving.NeitherJacknorTim___walking.isareareisareFinishthefollowingexercises:BobBob_____aworker.isMike

MikeandBob_____workers.areBothMikeandBob____workers.areNeitherMikenorBob___ateacher.isBillNeither

ofthem___________(know)howtoteachEnglish.

knows/knowAllofthem______workers.Noneofthem___________(know)howtoteachEnglish.are

knows/know主謂一致主要有以下幾種情況：1.and連接兩個(gè)或兩個(gè)以上單數(shù)名詞或者代詞作主語(yǔ)的時(shí)候,謂語(yǔ)動(dòng)詞有以下兩種情況：(1)Heandshe_____bothstudentsofthisschool.

他和她都是這個(gè)學(xué)校的學(xué)生。如果指兩個(gè)或兩個(gè)以上不同的人或事物的時(shí)候,謂語(yǔ)動(dòng)詞用復(fù)數(shù)。一、語(yǔ)法一致原則are(2)但如果連接兩個(gè)以上的名詞指的是同一個(gè)人或物,或者指同一概念的時(shí)候,謂語(yǔ)要用單數(shù)。

Thesingeranddancer____goingtogiveusaperformance.

那個(gè)歌唱家兼舞蹈演員要給我們表演。

Theknifeandfork____onthetable.

刀叉在桌子上。

isis2.如果主語(yǔ)是不定式,動(dòng)詞ing形式或主語(yǔ)從句的時(shí)候,謂語(yǔ)動(dòng)詞一般用單數(shù)。

Whenheiscoming______veryimportant.他什么時(shí)候要來(lái)看起來(lái)很重要。

Collectingstamps____hishobby.

收集郵票是他的愛(ài)好。

Toloveher_____nottobreakherwings.

愛(ài)她就不該折斷她自由飛翔的翅膀。seemsisis3.定語(yǔ)從句的關(guān)系代詞who,which,that在從句中作主語(yǔ)時(shí)，要與先行詞的人稱和數(shù)保持一致。

Thosewho______singingmayjoinus.Tom,who___yourfriend,shouldhelpyou.

enjoyis4.with,alongwith,togetherwith,aswellas,besides,like,without,except,but,including

如果句子中有這些連接詞和主語(yǔ)連用,謂語(yǔ)動(dòng)詞的數(shù)隨主語(yǔ)的變化而變化。例如：

Theteacher,togetherwithhisstudents,_____plantingtreesinthestreet.

老師和他的學(xué)生們正在街道上植樹(shù)。isMr.Black,aswellastwowomen,______attheoffice.isMr.Black

with,togetherwith,alongwitheither...or;neither...nor;notonly...butalso,whether...or在句子中連接主語(yǔ)的時(shí)候或者在therebe句型中,謂語(yǔ)動(dòng)詞要和就近的主語(yǔ)保持一致。二、就近原則NeitheryounorI____wrong.There_____acupofteaandsomeapplesonthetable.amis

Notonlythestudentsbutalsotheteacher______foraholiday.wishes三、概念一致原則所謂概念一致原則是指謂語(yǔ)動(dòng)詞和主語(yǔ)一致不是取決于主語(yǔ)的語(yǔ)法形式,而是其實(shí)際意義。有的主語(yǔ)名詞在形式上是單數(shù),但在意義上卻是復(fù)數(shù)；有的主語(yǔ)名詞在形式上是復(fù)數(shù),但在意義上卻是單數(shù)。1.不定代詞all,more,some,any,none作主語(yǔ),謂語(yǔ)動(dòng)詞視情況而定。Alloftheapples____rotten.所有的蘋果都爛了。Alloftheapple____rotten.整個(gè)蘋果都爛了。

are

isNoneofthemoney_____left.沒(méi)有剩下一點(diǎn)錢。Noneofthestudents_____there.沒(méi)有學(xué)生在那里。

is

isNone和neither

有時(shí)當(dāng)作單數(shù)看待，有時(shí)當(dāng)作復(fù)數(shù)看待，主要根據(jù)說(shuō)話人的意思決定。做主語(yǔ)時(shí)，謂動(dòng)可用單數(shù)，也可用復(fù)數(shù)。但在代表不可數(shù)名詞時(shí)?？醋鲉螖?shù)，因而謂動(dòng)須用單數(shù)。Neither

ofthem___________(know)howtoteachEnglish.Noneofthem___________(know)howtoteachEnglish.

knows/know

knows/know2.therestof;halfof;partof;majorityof;percentof;onethirdof在句子中加名詞作主語(yǔ)的時(shí)候,謂語(yǔ)動(dòng)詞與of后面的名詞保持一致。Halfofthestudents_____finishedtheircomposition.一半的學(xué)生已經(jīng)完成了他們的作文。Halfoftheapple____bad.一半的蘋果壞了。About60percentofthestudentsinourschool____boys.我們學(xué)校,大約百分之六十的學(xué)生是男生.haveisare3.集合名詞作主語(yǔ),動(dòng)詞可用單數(shù),也可以用復(fù)數(shù)。主要由句子的意思決定。強(qiáng)調(diào)整體謂語(yǔ)動(dòng)詞用單數(shù)；指全體人員時(shí),動(dòng)詞則用復(fù)數(shù)。這一類常見(jiàn)的集合名詞有public,family,class,crowd,population,team,group。Hisfamily____goingout.他們?nèi)乙獬觥isfamily____allmusiclovers.他們?nèi)胰硕际且魳?lè)愛(ài)好者。is

are

4.某些名詞如people,police,cattle等,形式上是單數(shù),但意義上是復(fù)數(shù),謂語(yǔ)動(dòng)詞應(yīng)用復(fù)數(shù)。people指“民族”時(shí)是例外。

Thepolice____searchingforathief.Thecattle____eatinggrassonthehill.areare5.復(fù)合不定代詞作主語(yǔ),謂語(yǔ)動(dòng)詞要用單數(shù)，如someone,somebody,something,anybody,anyone,anything,everybody,everyone,everything,nobody,noone,nothing。

Someone_____askingforyou.

有人找你。

Nothing_____foundintheroom.

在屋子里什么也沒(méi)找到。isis6.某些名詞如clothes,trousers,shoes,glasses等,通常只用其復(fù)數(shù)形式,但當(dāng)它們被apairof修飾時(shí),謂語(yǔ)動(dòng)詞用單數(shù)。如:Theshoes_____wornout.

鞋子破了。

Thepairofshoes_____wornout.

這雙鞋破了。

areis名詞如trousers,pants,shorts,glasses,scissors以及clothes,goods等做主語(yǔ)，謂動(dòng)要用復(fù)數(shù)；但當(dāng)這類詞前有a/thepairof修飾時(shí)，謂動(dòng)用單數(shù)。某些名詞以s結(jié)尾如maths,politics,physics,news,plastics等，謂語(yǔ)動(dòng)詞應(yīng)用單數(shù)。物理是一門很有趣的學(xué)科。Physicsisaveryinterestingsubject.8.every...andevery...;each...andeach...;no...andno...

在以上短語(yǔ)中and連接的單數(shù)名詞,整個(gè)短語(yǔ)在句中作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞常使用單數(shù)。

Eachmanandeachwoman______askedtoattend.

is班級(jí)中的每個(gè)男孩女孩都很用功。聽(tīng)不到任何聲音。Everyboyandeverygirlintheclassisdiligent.Nosoundandnovoice

isheard.9.以anumberof

作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞用復(fù)數(shù);以thenumberof

作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞用單數(shù)。

Anumberofnewbooks_____onthedesk.Thenumberofstudentsinyouclass_____50.

areis10.有些名詞的單數(shù)和復(fù)數(shù)形式一樣,作主語(yǔ)的時(shí)候,其謂語(yǔ)動(dòng)詞由上下文決定,這一類名詞有:means,works,deer,fish,sheep,Chinese,Japanese等。

Noteverymeans____useful.

不是每種方法都好使。

Notallmeans______useful.

不是所有的方法都好使。isare11.manya,morethanone,oneandahalf與單數(shù)名詞組成的短語(yǔ),謂語(yǔ)用單數(shù)。

Manyaboy____seenit.許多孩子都看到了。12.書刊名、時(shí)間、距離、價(jià)格、度量衡等的復(fù)數(shù)名詞作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞常用單數(shù)。

Thirtyyears____notalongtime.

RootsisafamousAmericannovel.hasis1.thiskindofbook=abookofthiskind(這種書),其謂語(yǔ)用單數(shù);短語(yǔ)thiskindofmen=menofthiskind=thesekindofmen(口語(yǔ))(這一類人),但thiskindofmen的謂語(yǔ)用單數(shù),menofthiskind和thesekindofmen的謂語(yǔ)用復(fù)數(shù),allkindsof后跟復(fù)數(shù)名詞,謂語(yǔ)用復(fù)數(shù)形式。例如：應(yīng)該注意的幾個(gè)問(wèn)題:

Thiskindofmen____dangerous.Menofthiskind_____dangerous.2.在主謂倒裝的句子中,謂語(yǔ)動(dòng)詞的數(shù)應(yīng)與其后的主語(yǔ)一致。例如:Betweenthetwowindows______apicture.isarehangs3.“分?jǐn)?shù)或百分?jǐn)?shù)+名詞”構(gòu)成的短語(yǔ)以及由“alotof,lotsof,plentyof,alargequantityof,aheapof,heapsof,halfof+名詞”構(gòu)成的短語(yǔ)作主語(yǔ)時(shí),其謂語(yǔ)動(dòng)詞要與短語(yǔ)中of后面的名詞的數(shù)保持一致,這是因?yàn)槎陶Z(yǔ)中后面的名詞是中心詞,而短語(yǔ)中前面的量詞是修飾語(yǔ)。例如:Lotsofdamage____causedbyfire.Aboutthree-fourthsoftheearth’ssurface____coveredwithwater.Three-fifthsoftheworkershere___women.和這種情況類似的還有“anumberof+名詞復(fù)數(shù)”。但是,“thenumberof+名詞”的中心詞卻是number。試比較：

wasisareAnumberofstudents___gonetothecountrysidetohelpwiththeautumnharvest.Thenumberofpagesinthisbook______twohundred.haveis注意:a(large)quantityof

修飾可數(shù)或不可數(shù)名詞,其短語(yǔ)作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞用單數(shù)。Alargequantityofpeople___neededhere.isquantitiesof

修飾可數(shù)或不可數(shù)名詞,其短語(yǔ)作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞一般用復(fù)數(shù)。例如:Quantitiesoffood(nuts)_____onthetable.短語(yǔ)inquantity,inlargequantities意為“大量”;insmallquantities意為“少量”。were4.agreatdealof,alargeamountof,修飾不可數(shù)名詞,其短語(yǔ)作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞通常用單數(shù);largeamountsof

修飾不可數(shù)名詞,其短語(yǔ)作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞通常用復(fù)數(shù)。例如:Alargeamountof(Agreatdealof)damage____doneinaveryshorttime.Largeamountsofmoney___spentonthebridge.waswere5.表示數(shù)量的oneandahalf后,名詞要用復(fù)數(shù)形式,但是其短語(yǔ)作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞用單數(shù)形式。例如：

Oneandahalfbananas___leftonthetable.is6.如果主語(yǔ)由“the+形容詞(或過(guò)去分詞)”結(jié)構(gòu)擔(dān)任時(shí),謂語(yǔ)通常用復(fù)數(shù);這類詞有:thebrave,thepoor,therich,theblind,theyoung,theold,thesick,thedead,thedeafanddub,theoppressed,theinjured,thewounded,theunemployed

等;但也有少數(shù)的過(guò)去分詞與定冠詞連用時(shí)指?jìng)€(gè)別,則用單數(shù)。例如：Theblind____inspecialschool.Thedeparted(死者)_____awell-knownengineer.這類形容詞或分詞如果要表示個(gè)體時(shí),就要與名詞man,person或表示人的單數(shù)連用。例如:anoldman,arichperson,the(a)woundedsoldier.studywas主謂一致練習(xí)1.NowTomwithhisclassmates_____footballontheplayground.

A.play B.areplaying

C.plays D.isplaying2.Thirtydollars_____tooexpensive.

A.areB.isC.were D.be√√3."Ifanybody_____,pleaseputdown_____name,"saidtheteachertothemonitor.

A.wantstobuythebook/his B.wanttobuythebook/their

C.willbuythebook/one's D.wantstohavethebookbought/her4.Nothingbutonedeskandsixchairs_____intheroom.A.are B.isstayed C.is D.areleft√√5.Betweenthetworoads_____aTVtowercalled"SkyscraperTower".

A.standsB.standing C.whichstands D.stand6.--ShallIwaithereforthreehours?

--Yes.Threehours_____towaitforsuchadoctor.

A.arenotverylongforyou B.isnotlongenoughforyou

C.wasnotlongenoughforyou D.willbetoolongforyou√√7.Everystudentandeveryteacher_____.

A.aregoingtoattendthemeeting B.haveattendedthemeeting

C.hasattendedthemeeting D.isattendedthemeeting8.Thispairofshoes_____.

A.isher B.ishers

C.arehers D.areher√√9.Whatweneed______goodtextbooks.A.is B.are C.haveD.has√10._______hasbeendone. A.ninety—ninepercentsofthework B.Halfofwhathepromised C.Two-fifthsofthearticles D.Threequarterofthebusiness

√SupplementaryExercises

Multiplechoice:1.Onthewall______twolargeportraits.A.hangsB.hangC.hangedD.hanging2.“Newsofvictories_____pouringinasourarmyadvances,”thecompanycommandersaid.A.keepB.keepsC.keptD.havekept3.There_____alotofmilkinthebottle.A.areB.isC.wereD.has4.Zhang’sfamily____ratherbig,withtwelvepeopleinall.A.isB.areC.beingD.was5.NobodybutJane____thesecret.A.knowB.knowsC.haveknownD.isknown6.Allbutone_____herejustnow.A.isB.wasC.hasbeenD.were7.Alibrarywithfivethousandbooks____tothenationasagift.A.isofferedB.hasofferedC.areofferedD.haveoffered8.NotonlyIbutalsoJaneandMary__tiredofhavingoneexamafteranother.A.isB.areC.amD.be9.Thenumberofpeopleinvited____fifty,butanumberofthem____absentfordifferentreasons.A.were;wasB.was;wasC.was;wereD.were;were10.Whenandwheretobuildthenewfactory_____yet.A.isnotdecidedB.arenotdecidedC.hasnotdecidedD.havenotdecided高考鏈接1.Asaresultofdestroyingtheforests,alarge_____ofdesert_____coveredtheland.(上海2001）A.number;has

B.quantity;hasC.number;have

D.quantity;haveB精析：alargenumberof后面要接復(fù)數(shù)名詞，所以A不能作為答案。因?yàn)閐esert是單數(shù)，所以要填has。這句話的意思是“毀壞森林的結(jié)果是，大片沙漠覆蓋了陸地．”答案B2.____ofthelandinthatdistrict____coveredwithtreesandgrass.(上海2000)A.Twofifth,is

B.Twofifth,areC.Twofifths,is

D.Twofifths,areC精析:

分?jǐn)?shù)的分子用基數(shù)詞,分母用序數(shù)詞表示.如果分子大于1,分母序數(shù)詞后加-s.分?jǐn)?shù)和百分比作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞的形式取決于分?jǐn)?shù)和百分?jǐn)?shù)后面的名詞.句子中的主語(yǔ)land是單數(shù),所以謂語(yǔ)動(dòng)詞要用iscovered.答案C.3Eachofthestudents,workinghardathisorherlessons,____togotouniversity.SodoI.（全國(guó)1998）

A.hopesB.hope

C.hopingD.dohopeA精析：這句話的主語(yǔ)是Eachofthestudents，是單數(shù)，所以要hopes選作謂語(yǔ)?，F(xiàn)在分詞短語(yǔ)workinghardathisorherlessons作狀語(yǔ)，表示伴隨的情況。有的考生盲目地把lessons當(dāng)成了主語(yǔ)，填寫了hope，發(fā)生了錯(cuò)誤。本題的譯文：每一個(gè)努力學(xué)習(xí)的學(xué)生都想上大學(xué)。我也是。答案A。4.____peopleintheworldaresendinginformationbye-maileveryday.（上海2001）

A.Severalmillion

B.ManymillionsC.Severalmillions

D.ManymillionA精析:在million前如果有具體的數(shù)字或several等詞時(shí)，要用單數(shù)形式。many一般不與million等詞連用.表示“數(shù)百萬(wàn)”，英語(yǔ)為millionsof。這句話的意思是“每天，世界上有幾十萬(wàn)人通過(guò)e-mail傳遞信息?！贝鸢窤。5.Thenumberofpeopleinvited______fifty,butanumberofthem_______absentfordifferentreasons.(NMET'96)A.were;was

B.was;wasC.was;were

D.were;wereC6.Thenumberofstudentsinthisschool_________by5%everyyear.

(MET'92)A.riseB.raiseC.risesD.raises"thenumberof+復(fù)數(shù)可數(shù)名詞"作主語(yǔ)，表示"……的數(shù)目(數(shù)量)"，謂語(yǔ)動(dòng)詞用單數(shù)；"anumberof+復(fù)數(shù)可數(shù)名詞"作主語(yǔ)，表示"許多……"，謂語(yǔ)動(dòng)詞用復(fù)數(shù)。C7.Agooddealofmoney_________spentonbooks.(MET'84)A.haveB.hasC.havebeenD.hasbeenD9.Alibrarywithfivethousandbooks_________tothenationasagift.(MET'90)A.isofferedB.hasofferedC.areofferedD.haveofferedA10.E-mail,aswellastelephone,_________animportantpartindailycommunication.(上海'99)A.isplaying

B.haveplayedC.areplaying

D.playA11.NobodybutJane_________thesecret.(MET'86)A.knowB.knowsC.haveknownD.isknown12.Allbutone_________herejustnow.(MET'87)A.isB.wasC.hasbeenD.wereDB13.Eitheryouortheheadmaster_________theprizetothesegiftedstudentsatthemeeting.(上海'94)A.ishandingoutB.aretohandoutC.arehandingoutD.istohandoutD14.NotonlyIbutalsoJaneandMary_________tiredofhavingoneexaminationafteranother.(MET'87)A.is

B.are

C.am

D.beB15.Sheisoneofthefewgirlswho______inthekindergarten.(上海'94)A.iswellpaid

B.arewellpaidC.ispayingwell

D.arepayingwellB16.Heistheonlyoneofthestudentswho_________awinnerofscholarshipforthreeyears.(上海2002春)A.isB.are

C.havebeenD.hasbeenD17._____ofthelandinthatdistrict____coveredwithtreesandgrass.(上海2000)A.Twofifth;isB.Twofifth;areC.Twofifths;isD.Twofifths;areC"分?jǐn)?shù)或百分?jǐn)?shù)+of+名詞"作主語(yǔ)時(shí),謂語(yǔ)動(dòng)詞的數(shù)與名詞的數(shù)一致。18.Whenandwheretobuildthenewfactory_________yet.(MET'91)A.isnotdecidedB.arenotdecidedC.hasnotdecidedD.havenotdecidedA動(dòng)名詞、不定式或從句作主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞用單數(shù)形式。倒裝句及therebe句型中，謂語(yǔ)動(dòng)詞往往與最鄰近的一個(gè)主語(yǔ)保持一致。19.There______nolifeonthemoon.(MET'92)A.issaidtohaveB.aresaidtohaveC.issaidtobeD.aresaidtobeC20.Eachofthestudents,workinghardathisorherlessons，_________togoto

university.(上海'98)A.hopeB.hopesC.hopingD.hopedB"either/neither/each+of+復(fù)數(shù)名詞"作主語(yǔ)，謂語(yǔ)動(dòng)詞用單數(shù)。21.Agroupof_____areeating_____and______atthefootofthehill.(NMET'95)A.sheep;grass;leavesB.sheeps;grasses;leavesC.sheep;grass;leafD.sheeps;grass;leafsA22.Everypossiblemeans_________topreventairpollution,buttheskyisstillnotclear.(上海2000春)A.isusedB.areusedC.hasbeenusedD.havebeenusedC單復(fù)數(shù)同形的名詞作主語(yǔ)時(shí)，依照意義一致的原則，表示單數(shù)意義時(shí)，謂語(yǔ)用單數(shù)；反之，謂語(yǔ)用復(fù)數(shù)形式。這類名詞有：sheep,deer,means(方法、手段),works(工廠),species(種類)過(guò)關(guān)落實(shí)1.Asurveyoftheopinionsofexperts______thatthreehoursofoutdoorexerciseaweek________goodforone’shealth.A.show；areB.shows；isC.show；isD.shows；are

解析：“asurvey”作主語(yǔ)，謂語(yǔ)動(dòng)詞用單數(shù)；表時(shí)間，距離，金錢的可數(shù)名詞復(fù)數(shù)作主語(yǔ)，謂語(yǔ)動(dòng)詞也用單數(shù)。答案：B2.Welivedaybyday，butinthegreatthings，thetimeofdaysandweeks________sosmallthatadayisunimportant.A.isB.areC.hasbeenD.havebeen

解析：主語(yǔ)是“thetime”，故謂語(yǔ)動(dòng)詞用單數(shù)。答案：A3.Thecompanyhadabout20notebookcomputersbutonlyone-third________usedregularly.Nowwehave60workingalldaylong.A.isB.areC.wasD.were

解析：此處one-third指onethirdof20notebookcomputers，故為復(fù)數(shù)；與now相對(duì)，用過(guò)去時(shí)。答案：D4.MostofwhathasbeensaidabouttheSmiths________alsotrueoftheJohnsons.A.areB.isC.beingD.tobe

解析：主語(yǔ)為“大部分對(duì)Smith夫婦的說(shuō)法”，看成單數(shù)，謂語(yǔ)動(dòng)詞用is。答案：B5.Apoetandartist________comingtospeaktousaboutChineseliteratureandpaintingtomorrowafternoon.A.isB.areC.wasD.were

解析：apoetandartist指一個(gè)人，既是詩(shī)人，也是藝術(shù)家。答案：A6.Thefatheraswellashisthreechildren________skatingonthefrozenrivereverySundayafternooninwinter.A.isgoingB.goC.goesD.aregoing

解析：主語(yǔ)仍為thefather，單數(shù)形式；aswellashisthreechildren作句子的狀語(yǔ)，不影響謂語(yǔ)動(dòng)詞的單復(fù)數(shù)。答案：C7.________ofthelandinthatdistrict________coveredwithtreesandgrass.A.Twofifth；isB.Twofifth；areC.Twofifths；isD.Twofifths；are

解析：表示分?jǐn)?shù)時(shí)，分子大于一，分母(序數(shù)詞形式)加s；主語(yǔ)為land，不可數(shù)，故謂語(yǔ)動(dòng)詞用單數(shù)。答案：C8.Everypossiblemeans________topreventtheairpollution，buttheskyisstillnotclear.A.isused