人教版 必修三 Unit 2 Healthy eating（语法与写作）教案

///必修三Unit2Healthyeating适用学科高中英语适用年级高中一年级适用区域人教新课标版课时时长〔分钟〕2课时知识点情态动词表推测教学目标知识：掌握情态动词表推测；正反观点的写作。方法：要牢记情态动词表推测的用法,并能灵活运用。能力：能根据语境判断考点情态动词+havedone。教学重点掌握情态动词表推测；正反观点的写作。教学难点能根据语境判断考点情态动词+havedone。教学过程复习预习依据语境记词汇单词拼写1．Don’tglare(怒视)atmelikethat;youdeservedthescolding.2．Thepatientisrecoveringslowly;therefore,youhadbetterchoosesomefoodswhichdigest(消化)moreeasily.3．Thisshoptriesitsbesttomeettheneedsofitscustomers(顾客)．4．Thiskindoffishdoesn’tneedtobecooked.Itcanbeeatenraw(生的)．5．Ifyouplaceordersnow,wewouldgiveyoua5%discount(折扣)．语境填词(用所给词的适当形式填空)1．Childrenarealwayscuriousabouteverythingtheyseeandhear.Theywillaskallkindsofquestionscuriously.Tomeettheircuriosity,_we’dbetteranswerthem.(curiosity)2．Thisnewrailwaybenefitsthisareainmanyways.Itisbeneficialtothepeoplelivinginthisarea.Forthebenefitofmorepeople,weshouldbuildmorerailways.(benefit)3．Themanlooksstrong,_buthehasn’tenoughstrengthtolifttheheavybox.Heneedstostrengthenhisbody.(strength)二、课堂导入复习上节课情态动词概念概念：在动词(一般动词)之前形成动词的否认,疑问,时态,语态,语气或表示特殊意义的动词叫做助动词,其中具有感情色彩一些助动词叫做情态动词。情态动词是一种本身有一定的词义,但要与动词原形及其被动语态一起使用,给谓语动词增添情态色彩,表示说话人对有关行为或事物的态度和看法,认为其可能、应该或必要等。情态动词后面加动词原形。概念引入情态动词表猜想用法：Hemustbethenewteacher.TheymusthavecomefromShanghai.Theymay/mighthavehadacold.三、知识讲解知识点1情态动词表示对现在的推测【考查点】can用于肯定句中有时可以用来表示推测,意为“有时会〞；用于疑问句中可以表示推测,意为“可能〞,有时表示一种惊讶的语气；用于否认句中也可以表示推测,can’t意为“不可能〞,语气很强烈。MrBushisontimeforeverything.Howcanitbethathewaslateforthemeeting?

ItisusuallywarminmyhometowninMarch,butitcanberathercoldsometimes.2.【考查点】may,might用于肯定句中可以用来表示推测,意为“可能〞；用于否认句中也可以表示推测,maynot意为“可能不〞,表示一种不太确定的语气。

Thetrafficisheavythesedays.Imightarriveabitlate,socouldyousavemeaplace?

Lizamaywellnotwanttogoonthetrip—shehatestraveling.3.【考查点】must表示推测时只能用于肯定句中,意为“一定,必定〞,表示十分肯定的(在疑问句中或否认句中要用can)。—Hi,Tom.AnyideawhereJaneis?

—Shemustbeintheclassroom.Isawhertherejustnow.4.【考查点】should用来表示推测时意为“应该〞,即含有“按道理来说应当如此〞的意思。

ThepublictransportinBeijingisveryconvenient,sothereshouldn’tbeanydifficultyintravelingaroundthecity.知识点2表示对过去的情况进行推测【考查点】can/couldhavedone表示“本来可以做,而实际上未做〞或者“过去可能〞,疑问或否认形式表示对过去发生的行为表示疑心或不肯定,其中can’thavedone多用于语气强烈的否认,意为“不可能做过〞。

Shecan’thaveleftschool,forherbikeisstillhere.Theaccidentcouldhavebeenavoided.2.【考查点】may/mighthavedone表示对过去行为的推测,意为“可能做过〞。might所表示的可能性比拟弱,语气较委婉。此外mighthavedone可表示“本可能做而实际上未做〞。

—Ican’tfindmypurseanywhere.

—Youmayhavelostitwhileshopping.

3.【考查点】musthavedone表示对过去行为的推测,意为“一定,想必〞,语气十分肯定。

ItmusthavebeenTomthatparkedthecarhere,asheistheonlyonewithacar.

4.【考查点】should/oughttohavedone用于肯定句时,表示本该做某事,而实际上未做；用于否认句时,那么表示不该做的事反而做了。

I’mnotfeelingwellinthestomach.Ishouldn’thaveeatensomuchfriedchickenjustnow.

Yououghtn’ttohavebeenlateforyesterdayclassmeeting,asitwassoimportant.

5.【考查点】needn’thavedone表示本来不必做某事而实际上却做了。

Iactuallyneedn’thaveboughtsomuchwine—onlythreepeoplecame.知识点3dare和need的用法need表示“需要〞或“必须〞,作情态动词时,仅用于否认句或疑问句中,在肯定句中一般用must,haveto,oughtto,或should代替。如：Youneedn’tcomesoearly.—NeedIfinishtheworktoday?—Yes,youmust.注意：needn't+不定式的完成式“表示本来不必做某事而实际上做了某事〞。如：Youneedn'thavewaitedforme.dare作情态动词时,主要用于疑问句、否认句和条件从句中,一般不用在肯定句中。如：HowdareyousayI'munfair.Hedaren'tspeakEnglishbeforesuchacrowd,darehe?3.dare和need常用作实义动词,有时态、人称和数的变化,所不同的是,作实义动词时,在肯定句中,dare后面通常接带to的不定式,在否认和疑问句中,dare后面可接带to或不带to的不定式。如：Idaretoswimacrossthisriver.Hedoesnotdare(to)answer.Don'tyoudare(to)touchit!Iwonderedhedare(to)saythat.Heneedstofinishitthisevening.知识点4oughtto的用法oughtto表示应该。如：Yououghttotakecareofhim.表示推测。注意与must表示推测时的区别：Hemustbeathomebynow.〔断定他已到家〕Heoughttobehomebynow.〔不十分肯定〕Thisiswheretheoilmustbe.〔比拟直率〕Thisiswheretheoiloughttobe.〔比拟含蓄〕“oughtto+have+过去分词〞表示过去应做某事而实际未做。如：Yououghttohaveaskedhim(butyoudidn't).这时,oughtto和should可以互相换用。注意：在美国英语中,oughtto用于否认句和疑问句时,to可以省略。如：Oughtyousmokesomuch?Yououghtn'tsmokesomuch.知识点5议论文——正反观点比照【根底写作】请根据以下的写作内容,使用５个标准的英语句子描述全部所给的信息内容．写作内容作为一个中学生,你肯定经历过屡次考试,体验过成功,也遭遇过失败.请你根据提示内容,简要概述中学生普遍存在的对考试失败的两种态度,并结合自身实际,说明你的观点.态度一:当考试结果不尽人意时,情绪低落,丧失信心,不再继续努力.态度二:当考试失败时,分析找出失败的原因,鼓励自己,增强自信,防止再犯同样的错。你的观点:失败乃成功之母,……【审题】体裁:议论文时态:现在时人称:第一人称要点:(1)我们中学生经历过屡次考试,体验过成功,也遭遇过失败.(2)态度一:当考试结果不尽人意时,情绪低落,丧失信心,不再继续努力.(3)态度二:当考试失败时,分析找出失败的原因,鼓励自己,增强自信,防止再犯同样的错。(4)我的观点:失败乃成功之母,……文章结构句型短语(1)我们中学生经历过屡次考试,体验过成功,也遭遇过失败.对考试失败大致有两种态度.have/takemanytestsorexamsdowellintheexamsachievesuccesssufferfromfailure,fail(in)theexams(2)态度一:当考试结果不尽人意时,情绪低落,丧失信心,不再继续努力.beinlowspiritshavepassiveattitudesloseheart/confidencenolongerstudyhard;nolongertryone’sbest…(3)态度二:当考试失败时,分析找出失败的原因,鼓励自己,增强自信,防止再犯同样的错。findout/analyzethecauses,encourageoneselfhave/takeactiveattitudesbuildupself-confidence,avoidmakingthesamemistake(4)你的观点:失败乃成功之母,……inmyview/opinion,Asforme,…AsfarasIamconcerned,Iagreewith…Failureisthemotherofsuccess.表示不同观点的套语：Differentpeopleholddifferentopinions.Peoplehavetakendifferentattitudestowards…Peoplehavedifferentopinionsonthisproblem.不同观点之间的衔接：Onthecontrary…othersholdadifferentview.However,eachcoinhastwosides.Ontheotherhand,peopleobjectthat….比拟、比照：However,ontheotherhand,onthecontrary,unlike…bedifferentfrom…,【技巧点拨】根底写作是根据所给的内容组织成文,不是自由发挥。局部考生喜欢在文章中使用“Everycoinhastwosides〞过渡,但是这个句子并不包含任何信息点,不适合在根底写作中使用。2.注意使用表示转折和比照的词,如but,however,while,incontrast,comparedwith等。3.如果文章要言之有物最后要求考生发表自己观点,考生不能简单地说Iagreewith…或者Idisagreewith…,而是,有理有据。四、例题精析【例题1】—Canyoukeepthesecret?—You________worry—I’mnotgoingtomentionittoanyone.A．needn’t B．couldn’tC．mustn’t D．won’t【答案】选A【解析】考查情态动词。句意：“你能保守这个秘密吗？〞“你不必担忧,我不会向任何人提及它的。〞根据句意可知应选needn’t表示“不必〞。【例题2】Lookingpeopleintheeye________sometimesmakethemnervousandembarrassed.A．must B．canC．should D．shall解析：【答案】选B【解析】考查情态动词。句意：注视着别人的眼睛有时能够让他们感到紧张和为难。此句中情态动词can表示理论上的可能性。【例题3】Look！Therearesomanymistakesinyourcomposition.You________havefixedfullattentiononit.A．can B．shouldC．need D．might【答案】选B【解析】考查情态动词。句意：看！你的作文里有那么多的错误。你本应该把所有的注意力都集中在它上面的。表示“本应该做但实际上没有做〞应该用shouldhavedone结构,应选B。【例题4】Martinhasn’tgotintouchwithmeforages.He________mynewcellphonenumber.A．needn’tget B．mustn’tgetC．can’tget D．shouldn’thavegot【答案】选C【解析】考查情态动词。句意：马丁已经很长时间不和我联系了。他不可能有我的新号码。根据句意可知应选C项。【例题5】你班同学开展了一场“司机醉驾是否应该处分乘客〞的讨论。写作内容：请你根据下表提供的信息,给报社写一封信,介绍讨论的情况,并发表你的看法。少数同学赞成处分乘客大多数同学反对处分乘客1.减少交通事故,促进交通平安2.不乘坐醉酒司机的车,不仅是对自己负责,也是对司机和路人负责1.乘客难以判断司机是否醉酒2.即使乘客知道司机饮酒,如果司机不听从乘客的劝诫,处分乘客是不公平的你的看法：……DearEditor,I’mwritingtotellyouaboutthediscussionwe’vehadaboutwhetherpassengerswhorideinacardrivenbyadrunkendrivershouldbepunished.______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________YourssincerelyLiHua【答案】DearEditor,I’mwritingtotellyouaboutthediscussionwe’vehadaboutwhetherpassengerswhorideinacardrivenbyadrunkendrivershouldbepunished.Theminorityofthestudentsholdtheopinionthatpunishingthepassengershelpstoreducetrafficaccidentsandincreasetrafficsafety.Nottorideinacardrivenbyadrunkendriverisnotonlyaresponsiblebehaviorforpassengersthemselvesbutalsoforthedriversandotherpeopleontheroad.Themajorityofthestudents,however,disapproveoftheidea,statingthatitisdifficultforcommonpassengerstoknowwhetherthedriverhasbeendrinkingornot.What’smore,evenifthepassengerknowsthedriverhasdrunkalcoholandhasattemptedtopersuadethedrivernottodrive,itisunfairtopunishthepassengerwhenthedriverdoesnotfollowtheadvice.AsfarasIamconcerned,punishingpassengersaswellasthedriversisnotonlyunfairbutisalsohardtocarryout.

Yourssincerely,

LiHua【解析】1.确定文体结构：正反观点之间的论证应该是属于并列关系,而双方观点的论点和分论点那么为总分关系。而最后,考题要求考生写出自己的观点,这个属于对全文的总结。因此,文章的信息点划分非常明确,正反观点各占两个句子,考生的观点应该为最后一个句子。考生可以采用两种方法使自己的观点明确。第一种：第一句的信息点可以包含“少数同学赞成处分乘客〞〔总起〕和第一个原因,而第二句那么讲述第二个原因〔递进〕；第二种：第一句为总起,第二句那么包含了两个赞成的理由。陈述“大多数同学反对处分乘客〞这方面也是同理。五、课堂练习〔一〕选择适当的情态动词Accordingtotheschoolrule,you______walkthroughtheschoolgatewithoutpermission.(mustn’t/needn’t)Therewasalotoffunatyesterday’sparty.You______come.Whydon’tyou?(should/oughttohave)Motherisout.Iwill______stayathometolookaftermyyoungersister.(haveto/must)HeisfromanEnglishspeakingcountry,sohe______speakEnglishwell.(can/may)Finallythey______escapefromtheburningbuilding.(wereableto/could)Theskyscraperwasbuiltonwhat______beawasteland.(would/usedto)Ican’tbelievethat!How______hebesorudelikethis!(would/should)〔二〕完成下面A、B两项练习A.oughtto1.Heoughttohelphisbrotherworkouttheproblem.(改成否认句)

___________________________________________________________2．Tomoughttogotohavearest.〔改成一般疑问句〕______________________________________________________________3．Suchthingsoughttobedoneatonce,_____________？〔反意问句〕B.用must,haveto,can,oughtto,usedto和beableto的适当形式填空。1.Insomepartsoftheworld,you______boilthewaterbeforedrinkingit.2.Thebuscaughtfireseriously,butthepassengers¬¬¬¬______escapefromit.3.He______havestayedathomethismorning.Isawhimshoppinginanothercity.4.You______smokeinthispartofthehospital.5.You______keepasimplefirstaidboxathomeforanyaccidents.6.Ifsheiscompletelywell,she______bebackatschooltoday.7.Myfather______beaheavysmoker,butnowhehasgivenupthehabit.8.You______havefinishedthearticle.ThedeadlineislastFriday.

Sorry.Ihavebeenbusythesedays.Couldyougiveme3daysmore?9.She______breathe,soIusedthemouth-to-mouthway.10.He______havecaughtabadcoldlastnight,forhisforeheadfeltburning.〔三〕短文改错假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。删除:把多余的词用斜线(/)划掉。修改:在错的词下划一横线,并在该词下面写出修改后的词。注意:1.每处错误及其修改均仅限一词;2.只允许修改10处,多者(从第11处起)不计分。OnedayIpushedmycousinLiDonginwheelchaironanespecialnarrowsidewalk.Westruggledalongwithonewheelonthesidewalkortheotherontheroad.Suddenly,amanridinghismotorcyclepastusrapidly,missingLiDongbyseveralinch.Immediately,heturnedround,stoppedhismotorcycleandcameover.Wewereworriedshewouldblameusforhavestoodinhisway.Tooursurprise,hesaidnothingatallandhelpedoutpushthewheelchairuntilwereachedaslightlywidersidewalk.Thenheleftafterwecouldsaythankstohim.Wewereleavingashamedofwhatwethought.【答案解析】选择适当的情态动词1.mustn’t2.oughttohave3.haveto4.can5.wereableto6.usedto7.should完成下面A、B两项练习A.1.Heoughtnot(oughtn’t)tohelphisbrotherworkouttheproblem.

2.OughtTomtogotohavearest?

3.oughtthey?

B.1.must/haveto

2.wereableto

3.can’t/couldn’t

4.mustn’t

5.oughtto

6.oughtto

7.usedto

8.oughtto

9.wasn’tableto

10.must短文改错1.在wheelchair之前加a2.especial→especially3.or→and4.past→passed5.inch→inches6.she→he7.have→having8.去掉helped后的out9.after→before10.leaving→left课程小结本次课讲授的情态动词表推测以及正方观点的议论文写法。情态动词对现在和未来的推测对过去的推测使用场合mustmust+动词原形musthavedone肯定句may/mightmay/might+动词原形May/mighthavedone肯定句、否认句can/couldcan/coulddoCan/couldhavedone否认句、疑问名〔could可用于肯定句〕should用来表示一种估计的情况“按理会/估计会〞shoulddo/beshouldhavedone肯定句、否认句、疑问句这局部考查往往是与语境想结合,因此,同学在做题时要结合语境来分析题目,灵活地运用语法知识。课后作业〔一〕单项选择1.—How’syourtouraroundtheNorthLake?Isitbeautiful?—It________be,butitisnowheavilypolluted.A.willB.would C.should D.must2.—Guesswhat!IhavegotAformytermpaper.—Great!You______readwidelyandputalotofworkintoit.A.must B.should C.musthave D.shouldhave3.Theteacher_______havethoughtJohnsonwasworthitorshewouldn'thavewastedtimeonhim,Isuppose.A.should B.can C.would D.must4.Incrowdedplaceslikeairportsandrailwaystations,you___takecareofyourluggage.A.can B.may C.must D.will5.MyMP4playerisn’tinmybag.WhereIhaveputit?A.can B.must C.should D.would6.Thebiggestproblemformostplants,which________justgetupandrunawaywhenthreatened,isthatanimalsliketoeatthem.A.shan’t B.can’t C.needn’t D.mustn’t7.—Shelooksveryhappy.She______havepassedtheexam.—Iguessso.It’snotdifficultafterall.A.should B.could C.must D.might8.—Whereismydictionary?IrememberIputithereyesterday.—Youitinthewrongplace.A.mustput B.shouldhaveput C.mightput D.mighthaveput9.Asaresultoftheseriousflood,two-thirdsofthebuildingsinthearea.A.needrepairing B.needstorepair C.needsrepairing D.needtorepair10.Itoldyourfriendhowtogettothehotel,butperhapsIhavedrivenherthere.A.could B.must C.night D.should11.Thebosshasgiveneveryoneaspecialholiday,sowegotoworktomorrow. A.can’t B.mustn’tC.needn’t D.shouldn’t12.—Whatdoesthesignoverthereread?—“Noperson___smokeorcarryalightedcigarette,cigarorpipeinthisarea．〞A．will B．may C．shallD.must13.—Mycat’sreallyfat.—You______havegivenhersomuchfood.A.wouldn’tB.couldn’tC.shouldn’tD.mustn’t14.—Whatdoyouthinkwecandoforouragedparents?—You________doanythingexcepttobewiththemandbeyourself.A.don’thaveto B.oughtn’tto C.mustn’t D.can’t15.—TurnofftheTV,Jack.____yourhomeworknow?—Mum,justtenmoreminutes,please.A.Shouldyoubedoing B.Shouldn'tyoubedoingC.Couldn'tyoubedoing D.Willyoubedoing16.WhenIwasyoung,IwastoldthatI______playwithmatches.A.wouldn’tB.needn’tC.mustn’tD.daren’t17.Accordingtotheairtrafficrules,you__switchoffyourmobilephonebeforeboarding.A.may B.can C.would D.should18.—Yououghttohavecalledheryesterday.

—Yes,IknowI____.A．oughttoB．oughttohaveC．oughthavedoneD．oughttohavecalled19.Whydidyoukeepitasecretfromme?I____aboutit.A．shouldbetoldB．oughttohavebeentoldC．shouldhavetoldD．oughttobetold20.Ifhehadstartedatnineo’clock,he

havebeeninLondonbyeleveno’clock.A．mustB．mayC．oughttoD．hasto【答案解析】1.答案：C解析：该题考查的知识点是should的用法。根据对话的意思可以判断,theNorthLake应该是很美的一个湖泊,但现在被污染了,言外之意,这个湖泊之美要打上问号。Should这个情态动词有“按理推测〞的含义,可译成“理应……〞等含义,符合对话的真实意图。will表“现在的自然倾向〞,would表“过去习惯、倾向〞,must表“肯定推测〞,均不符句意。2.答案：C解析：musthavedone表示“过去肯定做了某事〞。shouldhavedone表示“本该做某事而没做〞。根据上文情景IhavegotAformytermpaper可判断出一定进行了广泛阅读并做了大量工作。所以答案为C项。3.答案：D解析：根据下面“否那么她是不会在他身上浪费这么多的时间的〞可以知道前面的意思是：老师一定是认为在Johnson身上花时间是值得的。musthavedone表示对过去情况的肯定猜想。4.答案：C解析：句意为：在像飞机场和车站这样拥挤的地方,你一定要照看好自己的行李。must表示“必须,一定〞,符合句意。5.答案：A解析：由句意“我的MP4不在我包里。我可能把它放哪儿了？〞可知应选A。canhavedone表示“过去可能做过〞,而musthavedone表示“过去肯定做过〞,只能用于肯定陈述句；shouldhavedone本应该做〔而事实上没做〕；wouldhavedone只能用于虚拟语气。6.答案：B解析：can在此表示能力,can’t表示“不能〞。此题所考查的知识点比拟简单,但由于句子结构比拟复杂,所以许多学生不是由于没有弄清知识点而误选,而是由于不理解句意而误选。全句意为：对于大多数植物来说,它们所面临的最大问题是(有些)动物喜欢以它们为食物,而当它们受到威胁时却不能起身逃跑。7.答案：C解析：musthavepassedtheexam表示“肯定是通过考试了〞,由前句中的“happy〞和下句中的“notdifficultafterall〞可以推知。8.答案：D解析：此题考查情态动词表推测的用法。句意“我的词典哪儿去了？我记得昨天放在这儿了。〞“你也许放错地方了〞。由句意可以看出是对过去情况的推测,应该用“情态动词+havedone〞的形式,故排除A、C两项；shouldhavedonesth.意为“过去本该做某事(而没做)〞,故排除B项。答案为D项,mighthavedone表示“可能做过某事〞。9.答案：A解析：句意为：由于猛烈的洪水侵袭,这个地区三分之二的建筑均需要修理。此题作主语的名词为复数形式,谓语动词用复数,need后边应用动名词的主动形式或不定式的被动形式。10.答案：D解析：此题考查情态动词。couldhavedone〔过去〕可能做过；本能够做……；musthavedone〔过去〕肯定做过；mighthavedone〔过去〕可能做过；shouldhavedone本应该做〔而事实上没做〕。由句意“我告诉你朋友该怎么去旅馆,但或许我应该开车送她去那儿。〞可知应选D项。11.答案：C解析：考查情态动词的否认形式的特定含义。can’t的意思是“不可能〞,shouldn’t表示“不应该〞,mustn’t与needn’t的意思大不相同,前者表示“禁止〞,意思是：一定不能；后者表示“没有必要〞,意思是“不必〞,相当于don’t

have

to,从前句“老板放了我们假〞,所以“明天没有必要上班〞,应选C。12.答案：C解析：shall用于第二、三人称,表示命令、允许、警告等,此处表示警告。will表示现在的意志、愿望等,意为“要,希望〞；may表示许可,或用于请求许可,意为“可,可以〞；must意为“必须,要,应当〞。13.答案：C解析：根据Mycat’sreallyfat.可以知道是说“本不应该给猫太多食物却给了〞所以答案为C。should/oughtn'ttohavedone,意为本来不应做但实际已做,表达遗憾的感情色彩。14.答案：A解析：句意：—你认为我们可以为我们年迈的父母做些什么事？—除了能真心地陪伴他们,你不必做任何事情。don'thaveto＝needn't“不必〞；oughtn'tto“不应该〞；mustn't“不可以〞；can't“不能〞。所以答案为A项。15.答案：B解析：此题结合交际用语考查should表语气的用法。should可表示惊奇、疑心、不满等情绪。此题句意：—Jack,关掉电视。你现在不该写作业吗？—妈妈,就看十分钟。情态动词与进行时连用常有表达感情色彩的功能。故B项正确。16.答案：C解析：句子的意思是：当我年轻的时候,〔家人〕就一直告诫我千万不要玩火柴。must的否认形式mustn’t表示禁止,意思是“不能,不许〞。17.答案：D解析：此题考查情态动词的用法。句意“根据空中交通规那么,登机前应该关闭〞,情态动词should在此表示告诉某人应该做什么,应选D。18.答案：B

解析：简单对话中,只重复助动、系动词和情态动词,如既有情态动词,又有助动词或系动词,那么两者都重复,不重复行为动词。19.答案：B

解析:表示应该做某事,但事实上没做到,应用“should/oughtto+不定式的完成式〞,本句为被动语态。20.答案：C解析：如果他那时9点开始,就该在11点到伦敦。〔二〕阅读填空ClonesinFictionStoriesfeaturingclonesalwaysdrawmein.I'vereadenoughfictionbooksaboutclonesovertheyears.1.________TheLostGirlbySanguMandanna2．________EvaisAmarra'sclone.ShelearnswhatAmarralearnsinschool,eatswhatsheeats,andstudiesev