初中英語被動語態(tài)講解-練習(xí)與答案

jz*jz*被動語態(tài)一、考點、熱點回憶【詞匯辨析】across,through穿過across指從一定范圍的一邊到另一邊。動作是在物體的外表進(jìn)展。常用于橫穿街道、河流，穿過橋梁等。eg:Theywalkacrossthebridge.他們步行走過了這座橋。through側(cè)重從物體的內(nèi)部空間穿過，動作是在物體內(nèi)部進(jìn)展。常用于門、窗戶、森林等。eg:Hewalksthroughthepark.他步行穿過公園。ill，sick“生病的〃。{ill只在系動詞后作表語eg:Hermotherwasillinbed.sick既可作表語eg:Hermotherwassickinbed.、也可作定語eg:Janeistakingcareofhersickmother.假設(shè)ill作定語，譯為“壞的，惡劣的〃eg:anillperson一■個壞人sick作表語時也常譯為“惡心的，想吐的“eg: Theboyalwaysfeelssickwhenhetravelsbycar.【固定搭配】動詞+名詞/代詞/副詞+介詞makeroomfor給.....騰出地方eg:Wecanmakeroomforheratthistable.playajokeon戲弄人；對人惡作劇eg:Wecan'tplayajokeonlaw.speakhighlyof稱贊eg:Thecustomsspeakhighlyoftheirqualityofservice.saygoodbyeto辭別；告辭eg:Idon'twanttosaygoodbyetothem.takeanactivepartin積極參力口eg:Theytakeanactivepartinschoolactivities.takecareof照顧；照料；注意eg:CouldyoutakecareofmyplantswhileI'monvacation"【被動語態(tài)】〔一〕語態(tài)：英語的語態(tài)是通過動詞形式的變化表現(xiàn)出來的。英語中有兩種語態(tài)：|主動語態(tài)和被動語態(tài)。主動語態(tài)表示主語是動作的執(zhí)行者。例如：ManypeoplespeakChinese.謂語：speak的動作是由主語manypeople來執(zhí)行的。被動語態(tài)表示主語是動作的承受者，即行為動作的對象。例如：Chineseisspokenbymanypeople.主語English是動詞speak的承受者?！捕潮粍诱Z態(tài)的構(gòu)成被動語態(tài)由“助動詞be+及物動詞的過去分詞”構(gòu)成。人稱、數(shù)和時態(tài)的變化是通過be的變化表現(xiàn)出來的。現(xiàn)以speak為例說明被動語態(tài)在各種時態(tài)中的構(gòu)成。一■般現(xiàn)在時：am/is/are+spoken一■般過去時：was/were+spoken一般將來時：will/shallbe+spoken現(xiàn)在進(jìn)展時：am/is/arebeing+spoken過去進(jìn)展時：was/werebeing+spoken現(xiàn)在完成時：have/hasbeen+spoken過去完成時：hadbeen+spoken〔三〕被動語態(tài)的用法〔1〕不知道或沒有必要說明動作的執(zhí)行者是誰。例如：Somenewcomputerswerestolenlastnight.一■些新電腦在昨晚被盜了。〔不知道是誰偷的〕Thisbridgewasfoundedin1981.這座橋竣工于1981年。〔2〕強調(diào)動作的承受者，而不強調(diào)動作的執(zhí)行者。例如：TheglasswasbrokenbyMike.玻璃杯是邁克打破的。Thisbookwaswrittenbyhim.這本書是他寫的。Yourhomeworkmustbefinishedontime.你們的家庭作業(yè)必須及時完成?！菜摹持鲃诱Z態(tài)變被動語態(tài)的方法〔1〕把主動語態(tài)的賓語變?yōu)楸粍诱Z態(tài)的主語。〔2〕把謂語變成被動構(gòu)造E?十過去分詞〕〔根據(jù)被動語態(tài)句子里的主語的人稱和數(shù)，以及原來主動語態(tài)句子中動詞的時態(tài)來決定be的形式〕?！?〕把主動語態(tài)中的主語放在介詞by之后作賓語，將主格改為賓格。例如：Allthepeoplelaughedathim「Hewaslaughedatbyallpeople.Theymakethebikesinthefactory.—Thebikesaremadebytheminthefactory.Hecutdownatree.—Atreewascutdownbyhim.〔五〕含有情態(tài)動詞的被動語態(tài)含有情態(tài)動詞的主動句變成被動句時，由“情態(tài)動詞+be+過去分詞〃構(gòu)成Wecanrepairthiswatchintwodays.—Thiswatchcanberepairedintwodays.Theyshoulddoitatonce.—Itshouldbedoneatonce.〔六〕特殊情況.Hemadetheboyworkfortwohoursyesterday.—Theboywasmadetoworkbyhimfortwohoursyesterday..MotherneverletsmewatchTV.—IamneverlettowatchTVbymother.3.JackgavePeteraChristmaspresentjustnow.t〔1〕AChristmaspresentwasgiventoPeterbyJackjustnow.一〔2〕PeterwasgivenaChristmaspresentbyJackjustnow.常見的句型構(gòu)造：Itis(was)agreed(believed/decided/hoped/thought 〕that 大家同意〔相信、決定、希望、認(rèn)為〕Itis(was)wellknownthat 眾所周知Itis(was)takenforgrantedthat 被視為當(dāng)然Itmustberememberedthat 務(wù)必記住 Itmustn’tbeforgottenthat 千萬別忘記 Itis(was)said(reported，heard，told，suggested)that 據(jù)說(報道、聽說、告知、建議)二、典型例題〕1．TheOlympicGames everyfouryears.Aareheld Bwereheld C．a(chǎn)reholding D．willho1d〕2.Intheartshow，alotofenjoyment__toforeignfriendsbytheChinesepaintings．A．isgivingBisgivenCwillgiveDhasgiven〕3.TodayChineseisbecomingmoreandmorepopular.It in.manyschoolsaroundtheworld.A.teaches B.isteachingC.hastaughtD.istaught〔 〕4.BaJin,oneofthegreatestwritersinChina, as"People'sWriter".A.isregardedB.hasregardedC.isregardingD.regards〔 〕5.Usuallycomputers tosearchtheInternet.A.use B.areusingC.areusedD.used〔 〕6.--Doyouoftencleanyourclassroom"--Yes.Ourclassroom everyday.A.cleanB.cleansC.iscleaned〔 〕7.一一DidyouhearthatwaterinTaiLakesmeltterrible"一一Yes.Infact,it.That'sallbecauseofthepeopleandthefactoriesaround.A．polluted Bwaspolluted Chaspolluted D．waspo11ute〔 〕8.--Ourenvironmentisgettingworsethanbefore.--You'reright.ButthankstoEarthDay ,peoplehavedonemoreandmoreusefulthingsto「廣。1?陽保護(hù))theearthsinceEarthDay.A.isstarted B.wasstarted C.hasstarted〔 〕9.---IfeelveryhappythatI tobethehost.---Congratulations!A.chooseB.amchosenC.waschosenD.havenchosen〔 〕10.Manytreesandflowers inourschoollastyear，andtheymadeourschoolabeautifulgarden.A.plantB.plantedC.haveplantedD.wereplanted

〔〕11.Somefamouspaintings inthehallnextweek.A.willshowB.wereshownC.isshownD.willbeshown〔〕12.Atalkondevelopmentsinscienceandtechnologyintheschoolhallnextweek.A.givenB.willbegivenC.hasbeengivenD.gives〔 〕13.---Greatchangeshavetakenplaceinthiscity.---Right.Manymoderntallbuildingshavebeen thesedays.A.turnedupB.putup C.shownup D.fixedup〔〕14.Twelve-year-oldsshouldnottodriveinChina.A.allow B.beallowC.allowedD.beallowed〔 〕15.—Doyouoftencleanyourclassroom"—Yes,ourclassroom everyday.A.cleanB.cleansC.iscleanedD.Cleaned三、課后練習(xí)〔〕1．—Susan,whyareyoustillhere"Theyareallreadytostart.-I'msorry,butIwhentomeet.A.don’ttell B.didn’ttell C.haven’ttoldD.wasn’ttold〔〕2．Manyoldhousesaroundourschool nextyearandalargegreenareawillappear.A.pulldown B.willbepulleddown〔〕3．---Mywatch .---Don’tworry.Let’sgototheLost&Found.A.pulldown B.willbepulleddown〔〕3．---Mywatch .---Don’tworry.Let’sgototheLost&Found.A.islost B.isbroken〔 〕4．---DidyougotoSam’sweekendparty"---No,I .A.amnotinvited B.wasn’tinvitedC.willpulldownD.arepulleddownC.hasfound D.hasstoppedC.haven’tinvitedD.didn’tinvite〔 〕5．--Howoften yourschoolsportsmeeting --Onceayear.A.does;hold B.was;hold C.is;held D.did;hold〔 〕6．OnMay30th,,onebowlintheMingdynasty（明朝） atthepriceof30.36millionHongKongdollars.A.sell B.sold C.issold D.wassold〔 〕7．The"Thousand-handGuanyin" bymanypeopleasthebestperformanceatCCTV'sSpringFestivalEvening.A.hasbeenregardedB.areregarded C.hasregarded D.regards〔 〕8．—Thoseeggsofdifferentcolorsareverybeautiful.—Yes,they inHangzhou.A.painted B.werepainting C.werepainted D.hadpainted〔〕9．---Don’tlittertheground,boy,Lookatthesign::“Rubbishintothedustbin.〞---Sorry.A,hasthrow B,wasthrow C,mustthrowD,mustbethrown〔〕10．The29th0lympicGames__inBeijingin2008．A．willhold Bwillbeheld C．hold〔〕11.Thegirlwasoftenheardhappilyinherroom.A.sing B.tosing C.singing D.sings〔〕12.Itisreportedthatmorenewteachingbuildings inourschoolinthenextterm.A.willbebuilt B.wasbuilt C.hasbuilt D.willbuild〔〕13.Itisreportedthatmorenewteachingbuildings inourschoolinthenextterm.A.willbebuilt B.wasbuilt C.hasbuilt D.willbuild〔〕14.Thesickboy tohospitalbythepoliceyesterday.A.istakenB.wastakenC.takes D.took〔〕15.--It’sdifficultforthevillagechildrentocrosstheriverforschool.--Ithinkabridge overtheriver.A.wasbuiltB.isbeingbuiltC.hasbeenbuiltD.shouldbebuilt〔〕16.--David,turnofftheTV nooneiswatchingit.--Butit offalready!Themusicisfromtheradio.A.sothat,hasbeenturnedB.when,hasturnedC.if,hasbeenturnedD.because,hasturned〔〕17.UsuallyJohntoschoolinhisfather’sbeautifulcar.A.hastakenB.istakingC.istakenD.hasbeentaken〔〕18.Don’tputofftoday’sworkfortomorrow.Imean,today’swork today.A.maydoB.mustdoC.maybedoneD.mustbedone〔 〕19.--Look,whatanoldpalace!Itlookssogreat!--Yeah,it nearly800yearsago.A.wasbuildingB.wasbuiltC.hasbuiltD.isbuilt〔〕20.Don’tdiscusstheproblemswithyourpartnerunlessyou todoso.A.ask B.areasked C.willask D.willbeaskedword.zl-word.zl-典型例題一般現(xiàn)在時1A。［解析］考察被動語態(tài)，根據(jù)句意，“奧運會每四年舉行一次〃可見須用一般現(xiàn)在時的被動語態(tài)，故排除了B、C、D。2［答案］B。［解析］此題考察被動語態(tài)，句中alotofenjoyment是動作的承受者?！霸谶@次藝術(shù)展中，一些有趣的東西通過中國國畫展示給外國朋友。〞3［答案］D。［解析］考察被動語態(tài)。物作主語，一般要考慮被動語態(tài)。但如果動詞指的是物的特性，不能用被動語態(tài)。4［答案］A。［解析］選用一般現(xiàn)在時態(tài)的被動語態(tài)，表示人們對這位偉大作家的愛戴。5［答案］6。［解析］從句子看，電腦作主語，是動作的承受者，所以用被動語態(tài)，應(yīng)選C。6.［答案］C。［解析］考察被動語態(tài)物作主語，一般要考慮被動語態(tài)。但如果動詞指的是物的特性，不能用被動語態(tài)。一般過去時1［答案］B?？疾毂粍诱Z態(tài)。物作主語，一般要考慮被動語態(tài)。但如果動詞指的是物的特性，不能用被動語態(tài)。2［答案］B。［解析］從句意：“……自從'地球日’開場以來，人們已做了一些越來越有用的事保護(hù)環(huán)境。〃可知，“地球日'’的開場，要用一般過去時的被動語態(tài)，其構(gòu)成為wasstarted應(yīng)選B。We intofivegroupstogototheoldpeople'shome.Wedidmanythingstocheerthemup.［太原市］A.divided B.aredivided C.weredivided3［答案］C。［解析］此題主要考察被動語態(tài)的用法。根據(jù)句意及語境可推知空格處應(yīng)用被動語態(tài)的形式。由后一句"Wedidmanythings.”可推斷，時態(tài)應(yīng)該是一般過去時。因此選C。4C5D一般將來過去1［答案］D。［解析］此題綜合考察時態(tài)和語態(tài)。主語為“一些名畫〃，在此為動作“展出'’的承受者，故應(yīng)用被動語態(tài)，時間狀語為nextweek,是表示將來的時間狀語，所以句子時態(tài)是一般將來時，所以口項正確。2B答案B答案：D。情態(tài)動詞用于被動構(gòu)造為：情態(tài)動詞+be+過去分詞。答案為C。句中有everyday,主語為ourclassroom,故要用一般現(xiàn)在時的被動語態(tài)?！緟⒖即鸢浮?答案D解析：依據(jù)句意：對不起，但我不知道什么時候見面。強調(diào)動作發(fā)生在過去，I和tell之間是被動關(guān)系。.答案B解析：由題干時間nextyear科知識將來時態(tài)，句子主語是01dhouses，應(yīng)用被動語態(tài)。應(yīng)選B。.答案A解析：由Let,sgototheLost&Found.可知，說明表喪失了。應(yīng)選.答案B解析：由DidyougotoSam,sweekendparty"可知陳述過去的動作的發(fā)生，I和invite之間存在著被動關(guān)系。應(yīng)選B。.答案C解析：Howoften+一般疑問句？此句型用來提問在某一特定時間內(nèi)進(jìn)展某個動作的次數(shù)，表示“多長時間一■次“。往往針對頻度副詞如：always,seldom,usually,onceamonth,sometimes,everyfiveminutes.等提問，常用于現(xiàn)在時或過去時。由題干yourschoolsportsmeeting作主語，謂語應(yīng)用被動語態(tài)。應(yīng)選C。.答案D解析：由OnMay30th,，可知動作發(fā)生在過去；其主語是onebowl與sell存在被動關(guān)系。.答案A解析：依據(jù)題意：“千手觀音〃被許多人認(rèn)為是中央電視臺春節(jié)聯(lián)歡晚會最好的節(jié)目。表示過去發(fā)生或已經(jīng)完成的某一動作對現(xiàn)在的影響或產(chǎn)生的結(jié)果，應(yīng)用現(xiàn)在完成時。其主語是The"Thousand-handGuanyin",要用被動語態(tài)。應(yīng)選A。.答案C解析：they指代Thoseeggsofdifferentcolors，主語是物，故用被動語態(tài)。依據(jù)構(gòu)造，應(yīng)選C.。.答案D解析：依據(jù)句意：垃圾必須扔進(jìn)垃圾箱里。表示“命令〃，句子主語是垃圾，應(yīng)用被動語態(tài)。10.答案8解析：考察一般將來時的被動語態(tài)。由in2008可知是將來時，運動會應(yīng)該是“被舉行〃，所以使用一般將來時的被動語態(tài)：will+be+過去分詞。11選B?？疾焓挂蹌釉~的被動語態(tài)。在主動語態(tài)中卜62以后用省略to的動詞不定式作賓語補足語，而在被動語態(tài)中動詞不定式符號to需補上。由關(guān)鍵信息wasoftenheard可直接斷定正確答案為B。12選A?？疾煲话銓頃r的被動語態(tài)。由關(guān)鍵信息inthenextterm可知要用一般將來時，先排除B、C二項；另結(jié)合題意“據(jù)報道我們學(xué)校在下個學(xué)期有更多的教學(xué)樓被建造〞可知要用被動語態(tài)，故舍D選A。13選A14選B。由時間狀語yesterday可知此題要用一般過去時，先排除人、C二項；另根據(jù)題意“那個生病的男孩被警察送到了醫(yī)院'’可知要用被動語態(tài)，故舍D選B。15選D16選C。考察現(xiàn)在完成時的被動語態(tài)。結(jié)合題意“如果沒有人看電視就關(guān)掉它〃可知第一個空是條件狀語從句；另由關(guān)鍵信息“Themusicisfromtheradio.”可知“〔電視〕已經(jīng)關(guān)掉了〃，要用現(xiàn)在完成時的被動語態(tài)，故正確答案為C。17選C18選D?？疾旌閼B(tài)動詞的被動語態(tài)。由題意“今天的工作必須在今天被做完”可知此題要用被動語態(tài)，先排除人、B二項；結(jié)合題意可舍C選D。19選B?？疾煲话氵^去時的被動語態(tài)。由時間狀語nearly800yearsago可知要用一般過去時，先排除C、D二項；另結(jié)合題意“它〔古老的宮殿〕在近800年前被建造的'‘可舍A選B。20選B二、典型例題〕1.TheOlympicGames everyfouryears.Aareheld Bwereheld C.areholding D.willho1d〕2.Intheartshow，alotofenjoyment__toforeignfriendsbytheChinesepaintings.A.isgivingBisgivenCwillgiveDhasgiven〔 〕3.TodayChineseisbecomingmoreandmorepopular.It in.manyschoolsaroundtheworld.A.teaches B.isteachingC.hastaughtD.istaught〔 〕4.BaJin,oneofthegreatestwritersinChina, as"People'sWriter".A.isregardedB.hasregardedC.isregardingD.regards〔 〕5.Usuallycomputers tosearchtheInternet.A.use B.areusingC.areused D.used〔 〕6.--Doyouoftencleanyourclassroom"--Yes.Ourclassroom everyday.A.clean B.cleansC.iscleaned〔 〕7.一■DidyouhearthatwaterinTaiLakesmeltterrible"一一Yes.Infact,it.That'sallbecauseofthepeopleandthefactoriesaround.

A．pollutedBwaspollutedChaspollutedD．waspo11uteA．pollutedBwaspollutedChaspollutedD．waspo11ute〕8.--Ourenvironmentisgettingworsethanbefore.--You'reright.ButthankstoEarthDay--You'reright.ButthankstoEarthDay「廣。1?陽保護(hù)）theearthsinceEarthDay.A.isstartedB.wasstartedC.hasstartedA.isstartedB.wasstartedC.hasstarted〕9.---IfeelveryhappythatI tobethehost.〕9.---IfeelveryhappythatI tobethehost.---Congratulations!A.chooseB.amchosenC.waschosenD.havenchosenA.chooseB.amchosenC.waschosenD.havenchosen〕10.Manytreesandflowersinourschoollastyear，andtheymadeourschoolabeautifulgarden．A．plantB．plantedC．haveplantedD．wereplanted〕〕10.Manytreesandflowersinourschoollastyear，andtheymadeourschoolabeautifulgarden．A．plantB．plantedC．haveplantedD．wereplanted〕11.Somefamouspaintingsinthehallnextweek.A.willshowB.wereshownC.isshownD.willbeshownA.willshowB.wereshownC.isshownD.willbeshown〕12.Atalkondevelopmentsinscienceandtechnology〕12.Atalkondevelopmentsinscienceandtechnologyintheschoolhallnextweek.A.givenB.willbegivenC.hasbeengivenD.givesA.givenB.willbegivenC.hasbeengivenD.gives〕13.---Greatchangeshavetakenplaceinthiscity.thesedays.---Right.Manymoderntallbuildingshavebeenthesedays.A.turnedupputupshownupD.fixedupA.turnedupputupshownupD.fixedup〕14.Twelve-year-oldsshouldnottodriveinChina.A.allowB.beallowC.allowedD.beallowedA.allowB.beallowC.allowedD.beallowed〕15.—Doyouoftencleanyourclassroom"—Yes,ourclassroomeveryday.—Yes,ourclassroomeveryday.A.cleanB.cleansC.iscleanedD.CleanedA.clean課后練習(xí)〕1．—Susan,whyareyoustillhere"Theyareallreadytostart.-I'msorry,butIwhentomeet.A.don’ttellA.don’ttellB.didn’ttellC.haven’ttoldD.wasn’ttold〕2．Manyoldhousesaroundourschoolnextyearandalargegreenareawillappear.A.pulldownB.willbepulleddownC.willpulldownD.arepulleddown〕3．---Mywatch---Don’tworry.Let’sgototheLost&Found.A.islostB.isbrokenC.hasfoundD.hasstoppedA.islostB.isbrokenC.hasfoundD.hasstopped〕4．---DidyougotoSam’sweekendparty"---No,IA.amnotinvitedB.wasn’tinvitedC.haven’tinvitedD.didn’tinviteA.amnotinvitedB.wasn’tinvitedC.haven’tinvitedD.didn’tinvite〕〕5．--Howoftenyourschoolsportsmeeting--Onceayear.A.does;hold B.was;hold C.is;held D.did;hold〔〕6．OnMay30th,,onebowlintheMingdynasty（明朝） atthepriceof30.36millionHongKongdollars.A.sell B.sold C.issold D.wassold〔〕7．The"Thousand-handGuanyin" bymanypeopleasthebestperformanceatCCTV'sSpringFestivalEvening.A.hasbeenregardedB.areregarded C.hasregardedD.regards〔 〕8．—Thoseeggsofdifferentcolorsareverybeautiful.—Yes,they inHangzhou.A.painted B.werepainting C.werepainted D.hadpainted〔〕9．---Don’tlittertheground,boy,Lookatthesign::“Rubbishintothedustbin.〞---Sorry.A,hasthrow B,wasthrow C,mustthrowD,mustbethrown〔〕10．The29th0lympicGames__inBeijingin2008．A．willhold Bwillbeheld C．hold〔〕11.Thegirlwasoftenheardhappilyinherroom.A.sing B.tosing C.singing D.sings〔〕12.Itisreportedthatmorenewteachingbuildings inourschoolinthenextterm.A.willbebuilt B.wasbuilt C.hasbuilt D.willbuild〔〕13.Itisreportedthatmorenewteachingbuildings inourschoolinthenextterm.A.willbebuilt B.wasbuilt C.hasbuilt D.willbuild〔〕14.Thesickboy tohospitalbythepoliceyesterday.A.istakenB.wastakenC.takes D.took〔〕15.--It’sdifficultforthevillagechildrentocrosstheriverforschool.--Ithinkabridge overtheriver.A.wasbuiltB.isbeingbuiltC.hasbeenbuiltD.shouldbebuilt〔〕16.--David,turnofftheTV nooneiswatchingit.--Butit offalready!Themusicisfromtheradio.A.sothat,hasbeenturnedB.when,hasturnedC.if,hasbeenturnedD.because,hasturned〔〕17.UsuallyJohntoschoolinhisfather’sbeautifulcar.A.hastakenB.istakingC.istakenD.hasbeentaken〔〕18.Don’tputofftoday’sworkfortomorrow.Imean,today’swork today.A.maydoB.mustdoC.maybedoneD.mustbedone〔 〕19.--Look,whatanoldpalace!Itlookssogreat!--Yeah,it nearly800yearsago.A.wasbuildingB.wasbuiltC.hasbuiltD.isbuilt〔〕20.Don’tdiscusstheproblemswithyourpartnerunlessyou todoso.A.ask B.areasked C.willask D.willbeaskedword.zl-word.zl-典型例題一般現(xiàn)在時1A。［解析］考察被動語態(tài)，根據(jù)句意，“奧運會每四年舉行一次〃可見須用一般現(xiàn)在時的被動語態(tài)，故排除了B、C、D。2［答案］B。［解析］此題考察被動語態(tài)，句中alotofenjoyment是動作的承受者。“在這次藝術(shù)展中，一些有趣的東西通過中國國畫展示給外國朋友。〞3［答案］D。［解析］考察被動語態(tài)。物作主語，一般要考慮被動語態(tài)。但如果動詞指的是物的特性，不能用被動語態(tài)。4［答案］A。［解析］選用一般現(xiàn)在時態(tài)的被動語態(tài)，表示人們對這位偉大作家的愛戴。5［答案］6。［解析］從句子看，電腦作主語，是動作的承受者，所以用被動語態(tài)，應(yīng)選C。6.［答案］C。［解析］考察被動語態(tài)物作主語，一般要考慮被動語態(tài)。但如果動詞指的是物的特性，不能用被動語態(tài)。一般過去時1［答案］B。考察被動語態(tài)。物作主語，一般要考慮被動語態(tài)。但如果動詞指的是物的特性，不能用被動語態(tài)。2［答案］B。［解析］從句意："……自從’地球日’開場以來，人們已做了一些越來越有用的事保護(hù)環(huán)境?！芍?，“地球日”的開場，要用一般過去時的被動語態(tài)，其構(gòu)成為wasstarted應(yīng)選B。We intofivegroupstogototheoldpeople'shome.Wedidmanyt