【三维设计】2013高中英语Unit21HumanBiologySectionⅣ专题练习课下作业北师大版选修7Ⅰ.用适当的情态动词填空1．TomcomesfromAustraliaandhecanspeakEnglishverywell.2．Iheardyouboughtanewbook.MayIhavealook?3．Ifyoucanpassthedrivingtest,youshallgetanewcar.4．Itissunnytoday;weneedn'ttakeanumbrella.5．Wouldyouliketohaveadinnerwithme?6．—Mustwefinishthecompositioninclass?—No,youneedn't/don't_have_to.7．Youneedn'treadthatbookifyoudon'twantto.8．—Must/NeedIwaterthetreesonTuesday?—No,youneedn't.9．HeissostrongthatIdare_notfightagainsthim.10．Weought_tohavereceivedtheletteryesterday,butitdidn'tarrive.Ⅱ.完成句子1．菲利普可能已经在交通事故中严重受伤了。Philipmay_(might)_have_been_hurtseriouslyinthecaraccident.2．她不需要上场了，因为比赛被取消了。Shedidn't_need_to_playbecausethematchwascancelled.3．他本没必要带食物来聚会的，因为足够了。Heneedn't_have_broughtanyfoodtothepartybecausetherewasplentyalready.4．汤姆一定已经吃了蛋糕了，因为他的嘴上有些蛋糕。Tommust_have_eatenthecake,forthereissomeonhismouth.5．如果你跟着他学，你本可以向他学到更多东西的。Youmight_have_learnedmorefromhim,ifyouhadfollowedhim.Ⅲ.单项填空1．Althoughthis________soundlikeasimpletask,greatcareisneeded.A．mustB．mayC．shallD．should解析：选B。句意：尽管这听起来像是很简单的任务，但细心还是必要的。may表推测“可能”。2．Thereisnolighton－they________beathome.A．mustn'tB．can'tC．needn'tD．shouldn't解析：选B。句意：灯不亮——他们不可能在家。can用于否定句或疑问句中，表推测“(不)可能”，must表推测时，不用于疑问句或否定句中。3．—Who________itbethatisknockingatthedoor?—It________befather,butI'mnotsure.A．can;mustB．must;can1C．can;mayD．may;must解析：选C。第一个空can用于疑问句中表推测；第二个空受I'mnotsure限制，只能用may表推测“可能”；must表推测“一定”。4．Shewasagoodswimmer,soshe________swimtotheriverbankwhentheboatsank.A．couldB．mightC．shallD．wasableto解析：选D。句意：她游泳游得很好，所以小船下沉的时候她能游到河岸。could和wasableto都表能力，但could表示一般的能力，表示过去有能力并干成了某事只用was/wereableto。5．Why________weeatoutside________wehavesomuchdeliciousfoodathome?A．must;whenB．can;whileC．will;asD．should;though解析：选A。句意：既然我们家里有这么多好吃的东西，干嘛偏要出去吃呢？must表示“偏要，偏偏”；when在这里是“既然”的意思。6．Hedidnotregretsayingwhathedidbutfeltthathe________itdifferently.A．couldexpressB．wouldexpressC．couldhaveexpressedD．musthaveexpressed解析：选C。考查情态动词。句意：他并不遗憾说了他做的事，而是感觉他本来能用不同的方式表达。couldhavedonesth.意为“本来能够做某事，其实没做”，符合语境，故选C。7．Thelittlegirl________godownstairsalonewhenherparentswereout.A．didn'tdaretoB．darednotC．darenottoD．darenot解析：选B。考查情态动词。句意：当她的父母不在家时，这个小女孩不敢单独到楼下。dare作情态动词时后面要跟动词原形，排除C；而D时态不对，排除D；而A项中dare用作实义动词，后面应用动词原形。8．Ifyouhadspokentohimlasttimeyousawhim,you________whattodonow.A．wouldhaveknownB．shouldhaveknownC．wouldknowD．mayknow解析：选C。考查虚拟语气。句意：如果上次你见他时跟他说话，现在你就知道做什么了。根据语境可知主句是对现在情况的一种虚拟，要用would＋动词原形，故选C。9．—Whatdoyouthinkwecandoforouragedparents?—You________doanythingexcepttobewiththemandbeyourself.A．mustn'tB．oughtn'ttoC．don'thavetoD．can't解析：选C。考查情态动词。句意：“你认为我们能为我们年老的父母做些什么”“除了陪他们并且自己好好的，你没有必要做任何事”。don'thavetodo“没有必要做某事”，符合语境，故选C。10．You________furtherintothismatter.Ifso,you________knowwhodid2itnow.A．musthaveenquired;willB．shouldhaveenquired;wouldC．couldhaveenquired;willD．shouldn'thaveenquired;would解析：选B。考查情态动词与虚拟语气。句意：你应该深入调查此事。如果这样，你现在就知道是谁干的了。第一个空考查shouldhavedone“本应该做某事，其实没做”；第二个空考查虚拟语气，是对现在情况的一种虚拟，故用“情态动词＋do”，故选B。3
