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It的用法1.Ifyoudon’tknowthenewword,whydon’tyou________inthedictionary?A.lookatitB.lookafteritC.lookupitD.lookitup答：D。lookup(在词典、参考书中)查寻。副词与动词构成的词组与人称代词连用时，将人称代词放在中间。A和B项与题童不符。it指前文提到的事物。2.Therecomesthebus,_________?A.B.doesitC.doesn’titD.isn’titdoesn’tthere答：C。让指thebus。3.That’sofgreatimportance,_________?A.isn’titB.isn’tthatC.isn’tthisD.isthis答：A。讧用以代替指示代词ths，that。4.Isawnomorethanonecameraleftinthatshop.Willyougoandbuy_________?A.someB.itC.anyD.one譬：B。it为特指用陆，one为泛指。5.________wasapitynottohavegonetoShanghai.A.ThisB.ThereC.WhichD.It答：D。it为形式主语，真正的主语为不定式。6.—HaveyouheardthenewsaboutTom?—No,what_________?A.isitB.itisC.aretheyD.theyare答：A。it指thenews.7.________badmumerstolaughatpeoplewhentheyareintrouble.A.ItisB.ThereareC.That’sD.Theseare答：A。it为形式主语。8.It’stime_________thetablefordinner.A.topullB.tolayC.preparingD.puttingout答：B。不定式傲真正的主语。It’stimefor+名词或Ittimetodo....9.—________Whoisthere?—________HelemA.She’sB.That’sC.It’sD.There’s答：C。it指人10.It’snogood_________today’sworktilltomorrow.A.toputoffB.puttingoffC.putoffD.tobeputoff答：B。it是形式主语，在Itisgood(use)句型中，真正主语用动名词。11.Ittakesthespaceshipmorethanthreedaysto______themoan.A.tosendB.beingsentC.tobesentD.sending答：C。讧是形式主语，真正主语是不定式，此处应用不定式的被动式。12.Is______necessarytotellhisfathereverything?A.itB.thatC.whatD.he用心爱心专心1答：A。it用作形式主语。13.________InsummertheweatheristerriblyhotinNanjing.A.SoisitB.SoitisC.ItissoD.ltsois答：B。it指天气。强调同一件事不用倒装。14.Ifind______simpletolearntodriveacar.A.itsB.itC.heD.him答：B。it为形式宾语。I5.Itisnearlyhalfacentury________thefirstcomputerwasinvented.A.sinceB.whenC.thatD.until答：A。it指时间。16.HerunclehasmovedtoBeijinganddoesnotlivewithher.________hermother.A.NeitherdoesB.SohasC.NorhasD.Soitiswith答：D。表示“某人也……”时，当苗句中含不同的谓语动词，用soitiswith....或Itisthesamewith...句式。17.______isknowntoallthatTaiwanisapartofChina.A.ItB.ThisC.ThatD.Which答：A。it为形式主语，真正的主语为that从句。18.Thebabysaton________mother’sknees,learningtospeak.A.itB.it’sC.itsD./答：C。it可指代婴儿。19.Wetook______forgrantedthathewouldjoinus.A.thisB.thatC.itD.them答：C。it为形式宾语，真正宾语为that从句。20.________isforbiddentosmokeintheconcerthall.A.HereB.ItC.ThatD.This答：B。it做形式主语，不定式为真正主语。21.______noneedforustodiscusstheproblemagainsinceithasalreadybeenset-tied.A.IthasB.TherehasC.ItisD.Thereis答：D。noneed为名词做主语。或用Itisnotnecessary...。22.Wasitin1969________theAmericanastronautsucceeded________landingonthemoon?A.when,onB.that,onC.when,inD.that,in答：D。it用于强调句型中。23.Was________thatIsawlastnightattheconcert?A.ityouB.notyouC.youD.thatyourself答：A。为强调句的疑问句形式。24.______isfivekilometersfromhishometoourschool.A.ItB.ThisC.ThatD.There答：A。it指距离。25.Ihate________whenpeopletalkwiththeirmouthsfull.A.itB.thatC.theseD.them用心爱心专心2答：A。it指下文提到的现象。26.Itwasnotuntil1920________regularradiobroadcastsbegan.A.whileB.whichC.thatD.since答：C。此题为强调句。27.Does________matterifhecan’tfinishthejobontime?A.thisB.thatC.heD.it答：D。28.Is________necessarytocompletethedesignbeforeNationalDay?A.thisB.thatC.itD.he答：C。29.Tom’s...