《【紅對(duì)勾 講與練】（新課標(biāo)）2021年高三英語二輪專題復(fù)習(xí) 專題十 虛擬語氣課時(shí)作業(yè)10（含解析）》由會(huì)員分享，可在線閱讀，更多相關(guān)《【紅對(duì)勾 講與練】（新課標(biāo)）2021年高三英語二輪專題復(fù)習(xí) 專題十 虛擬語氣課時(shí)作業(yè)10（含解析）（7頁珍藏版）》請(qǐng)?jiān)谘b配圖網(wǎng)上搜索。
1、專題十虛擬語氣高考精萃1(2014北京卷)We _ (be) back in the hotel now if you didnt lose the map.2(2014天津卷)_ (catch) the morning train, he would not have been late for the meeting.3(2014重慶卷)It was John who broke the window. Why are you talking to me as if I _ (do) it?4(2014福建卷)_(be) there no modern telecommunications
2、, we would have to wait for weeks to get news from around the world.5(2014浙江卷)They were abroad during the months when we were carrying out the investigation, or they _ (come) to our help.6(2014安徽卷)People are recycling many things which they _ (throw) away in the past.7(2014湖南卷)If Mr. Dewey _ (be) pr
3、esent, he would have offered any possible assistance to the people there.8(2014陜西卷)We would rather our daughter _ (stay) at home with us, but it is her choice, and she is not a child any longer.9(2013北京卷)If we _(book) a table earlier, we wouldnt be standing here in a queue.10(2013天津卷)If he had spent
4、 more time practising speaking English before, he _ able to speak it much better now.11(2013安徽卷)I _(go) to my cousins birthday party last night, but I was not available.12(2013陜西卷)My mom suggests that we _ eat out for a change this weekend.13(2013浙江卷)Eye doctors recommend that a childs first eye exa
5、m _ at the age of six months old.14(2013重慶卷)It rained cats and dogs this morning. Im glad we took an umbrella.Yeah, we would have got wet all over if we _.15(2013福建卷)Do you think George has passed the driving test?No. If so, he _(drive) his car to our college yesterday.16(2013江蘇卷)I should not have l
6、aughed if I _(think) you were serious.17(2012遼寧卷)Jack is a great talker. Its high time that he _(do) something instead of just talking.18(2012北京卷)Dont handle the vase as if it _(be) made of steel.19(2012天津卷)We would have called a taxi yesterday if Harold _(offer) us a ride home.20(2012山東卷)If we _(ma
7、ke) adequate preparations, the conference wouldnt have been so successful.21(2012陜西卷)If my car _(be) more reliable, I would have driven to Lhasa instead of flying last summer.22(2012安徽卷)Grace doesnt want to move to New York because she thinks if she _(live) there, she wouldnt be able to see her pare
8、nts very often.23(2012湖南卷)Sorry, I am too busy now. If I _(have) time, I would certainly go for an outing with you.24(2012湖北卷)Had we not used an outofdate train schedule, we _(miss) the train.25(2011北京卷)Where are the children? The dinners going to be completely ruined.I wish they _(be) always late.2
9、6(2011北京卷)Maybe if I _(study) science, and not literature then, I would be able to give you more help.27(2011天津卷)I _(come) sonner but I didnt know that they were waiting for me.28(2011陜西卷)I _(go) through that bitter period without your generous help.29(2010天津卷)John went to the hospital alone.If he _
10、(tell) me about it, I would have gone with him.30(2010陜西卷)If we _(take) the other road, we might have arrived here in time for the meeting.答案與解析1should/could/would/might be句意：如果你沒有丟掉地圖，我們現(xiàn)在就回到賓館了。根據(jù)句意可知，if引導(dǎo)的從句是對(duì)過去事實(shí)的闡述，而主句表示與現(xiàn)在事實(shí)相反的虛擬，其謂語動(dòng)詞應(yīng)為：would/should/could/mightdo結(jié)構(gòu)。2Had he caught句意：要是他趕上了早晨的火
11、車，那他就不會(huì)開會(huì)遲到了。根據(jù)句意，此處是與過去事實(shí)相反的假設(shè)，條件狀語從句應(yīng)該用過去完成時(shí)。本題為省略if的虛擬條件句，應(yīng)把助動(dòng)詞had提到句首，變?yōu)榈寡b句式。3had done句意：是約翰打壞的窗戶，你為什么和我說呢？好像是我打壞的一樣。第一句已經(jīng)說明是John打壞的窗戶，所以第二句中as if后面要用虛擬語氣，而且是對(duì)過去的虛擬，故填had done。4Were句意：要是沒有現(xiàn)代化的通訊工具，我們要等上幾周才能獲取世界各地的新聞。根據(jù)主句謂語結(jié)構(gòu)would have to可知設(shè)空處表示與現(xiàn)在事實(shí)相反的假設(shè)，if條件從句謂語應(yīng)為“動(dòng)詞的過去式”，即If there were.，在虛擬條件句
12、中可以省略if，把were提到句首。5would have come句意：我們?cè)谧稣{(diào)查的那幾個(gè)月，他們?cè)趪?guó)外，否則他們會(huì)來給我們幫忙的。由句意可知設(shè)空處表示與過去事實(shí)相反的假設(shè)。6would have thrown句意：人們現(xiàn)在回收的許多東西要是在以前就會(huì)被扔掉了。本題中定語從句部分為含蓄條件句，表示“要是過去的話，這些東西就會(huì)被扔掉了”。根據(jù)句意可知此處表示與過去事實(shí)相反的假設(shè)，故用would have done形式。7had been句意：如果Dewey先生當(dāng)時(shí)在場(chǎng)的話，他會(huì)為那里的人們提供任何可能的幫助。根據(jù)題干中的would have offered及上下文邏輯可知設(shè)空處與過去事實(shí)相反
13、，故答案為had been。在虛擬語氣中，如果條件從句和主句均與過去事實(shí)相反，條件從句謂語動(dòng)詞為：had過去分詞，主句謂語動(dòng)詞為：would/should/could/mighthave過去分詞。8stayed句意：我們希望女兒待在家里和我們?cè)谝黄?，但這是她的選擇，她不再是個(gè)孩子了。would rather. 表示“寧愿，希望”，其后的從句要用虛擬語氣。表示與現(xiàn)在或?qū)硎聦?shí)相反的假設(shè)時(shí)，從句用一般過去時(shí)；表示與過去事實(shí)相反的假設(shè)時(shí)，從句用過去完成時(shí)。如：Id rather I had not gone wrong yesterday.要是我昨天不出錯(cuò)就好了。9had booked句意：如果我們
14、早些訂位子，現(xiàn)在也就不用站在這里排隊(duì)了。分析語境可知，if引導(dǎo)的從句是與過去事實(shí)相反的假設(shè)，故用過去完成時(shí)。10would be句意：如果他以前花更多的時(shí)間練習(xí)說英語，他現(xiàn)在就能說得更好些。本題為錯(cuò)綜時(shí)間條件句，即if從句與過去事實(shí)相反，主句與現(xiàn)在事實(shí)相反。與現(xiàn)在事實(shí)相反的主句謂語部分為“would/should/could/might動(dòng)詞原形”。11would/should have gone句意：我昨天晚上本來想要/本應(yīng)該去我表兄的生日聚會(huì)，但是沒有空。句中的時(shí)間狀語last night明確表示應(yīng)該是對(duì)過去事實(shí)的虛擬，故答案是would/should have gone。12should句
15、意：媽媽建議我們這個(gè)周末出去吃飯來換換口味。suggest作“建議”講時(shí)，后面的從句要用虛擬語氣，從句謂語動(dòng)詞用“(should)動(dòng)詞原形”形式。13(should)be句意：眼科醫(yī)生建議，孩子的第一次眼睛檢查應(yīng)該在6個(gè)月大時(shí)進(jìn)行。recommend建議，其后的賓語從句中用should動(dòng)詞原形，且should可以省略。14hadnt句意：今天早上下了滂沱大雨。很高興我們帶了傘。是的。要是我們沒帶的話就全身濕透了。與過去事實(shí)相反的虛擬語氣，從句使用過去完成時(shí)。本題中if從句采用省略形式，補(bǔ)充完整后為：.if we hadnt taken an umbrella.15would have driv
16、en句意：你認(rèn)為喬治通過駕照考試了嗎？沒有。如果通過了，昨天他就會(huì)開車去我們大學(xué)了。由yesterday可知本句是與過去事實(shí)相反的假設(shè)，空格處應(yīng)填主句的謂語動(dòng)詞，故用would have driven。16had thought句意：如果我(當(dāng)時(shí))認(rèn)為你是認(rèn)真的，我就不會(huì)笑了。主句中謂語動(dòng)詞使用should not have laughed，表明與過去的事實(shí)相反，從句謂語動(dòng)詞應(yīng)該使用had done形式。17did/should do句意：杰克是一個(gè)大空談家，到他該做事情而不是空談的時(shí)候了。根據(jù)虛擬語氣句型It is high time that sb.did sth.或It is high
17、time that sb.should do sth.(到某人該做某事的時(shí)候了)可得出答案。18were句意：不要把那個(gè)花瓶當(dāng)作是鋼做的那樣搬運(yùn)。as if引導(dǎo)的是與現(xiàn)在事實(shí)相反的虛擬語氣，謂語動(dòng)詞應(yīng)用一般過去時(shí)，be動(dòng)詞用were。19hadnt offered句意：昨天如果Harold不讓我們搭車回家的話，我們就會(huì)叫出租車了。根據(jù)would have called及yesterday可知此句為與過去事實(shí)相反的假設(shè)，所以設(shè)空處為過去完成時(shí)，又根據(jù)句意得知此處應(yīng)為否定，所以填hadnt offered。20hadnt made句意：如果我們沒有做好充分準(zhǔn)備的話，會(huì)議就不會(huì)如此成功。分析句子結(jié)構(gòu)
18、可知本句是一個(gè)虛擬語氣句式，根據(jù)主句中的wouldnt have been可知是對(duì)過去事情的虛擬，因此if條件從句要用had done 形式來表示對(duì)過去發(fā)生事情的虛擬。21had been句意：如果我的車(性能)更可靠些的話，去年夏天我就開車去拉薩而不是坐飛機(jī)去了。根據(jù)語境可知題干為與過去事實(shí)相反的假設(shè)，if引導(dǎo)的條件從句應(yīng)該使用過去完成時(shí)。22were to live/lived/should live句意：格雷絲不想搬到紐約去，因?yàn)樗J(rèn)為如果她住在那里，她就不能經(jīng)常見到父母了。主句說明了客觀事實(shí)，if從句是對(duì)將來事實(shí)的假設(shè)，故在條件狀語從句中用were to live/lived/shou
19、ld live。23had句意：對(duì)不起，我現(xiàn)在太忙了。如果我有時(shí)間，一定會(huì)跟你去遠(yuǎn)足。根據(jù)前一句可知設(shè)空處是對(duì)現(xiàn)在的假設(shè)，故if從句謂語動(dòng)詞用過去式。24wouldnt have missed句意：要不是用了一張過期的火車時(shí)刻表，我們就不會(huì)誤了火車。表示與過去事實(shí)相反的假設(shè)，結(jié)合句意主句謂語動(dòng)詞應(yīng)該用wouldnt have done 形式。25werent句意：孩子們都到哪里去了？晚宴就要被他們給徹底破壞了。我希望他們不要總是遲到。wish后跟that從句，從句部分采用虛擬語氣。wish與be同時(shí)發(fā)生，再結(jié)合語境可知填werent。26had studied句意：也許如果當(dāng)時(shí)我學(xué)習(xí)的是科學(xué)而
20、不是文學(xué)的話，那么我現(xiàn)在就可以給你更多的幫助了。根據(jù)then一詞可以確定此處表示與過去事實(shí)相反，if引導(dǎo)的從句部分用“had done”形式。27would have come句意：我不知道他們一直在等我，否則，我就會(huì)快點(diǎn)來了。根據(jù)but后面內(nèi)容可知設(shè)空處表示與過去事實(shí)相反的虛擬語氣，其主句謂語動(dòng)詞形式：would/should/could/might have done。28couldnt/wouldnt have gone句意：如果沒有你的慷慨相助的話，我不可能熬過那段痛苦的時(shí)期。根據(jù)題干中的“that bitter period”可判斷本句與過去事實(shí)相反的虛擬語氣；without you
21、r generous help 相當(dāng)于含蓄條件從句If there hadnt been your generous help；主句部分采用couldnt/wouldnt have done 結(jié)構(gòu)。29had told句意：約翰一個(gè)人去了醫(yī)院。他那時(shí)要是告訴我，我就陪他去了。根據(jù)would have gone 得知本句是與過去事實(shí)相反的假設(shè)，所以設(shè)空處應(yīng)填had told。30had taken句意：如果我們走另一條路，我們可能就會(huì)及時(shí)到這兒參加會(huì)議了。根據(jù)句意及后邊主句謂語might have arrived 可知if 從句表示與過去事實(shí)相反的假設(shè)，故if 從句謂語動(dòng)詞用過去完成時(shí)形式。模擬
22、精選1(2014杭州高考科目教學(xué)質(zhì)檢)The voluntary service saved you a sum of money that you otherwise _ (spend) on the agency responsible for finding your pets.2(2014河南洛陽統(tǒng)考)No sooner had the words been spoken than he realized that he _(remain) silent.3(2014福州質(zhì)量檢測(cè))What if you _(forget) to send an essay with your appl
23、ication?I would have been rejected.4(2014陜西質(zhì)量檢測(cè)一)We are close friends. We _ (face) the problem together, but why didnt you let me know?5(2014河北唐山統(tǒng)考)It was suggested that an armed guard _(stand) in readiness, protecting the president.6(2014北京東城統(tǒng)一檢測(cè))Do you like the school?Yeah. I only wish the classes
24、 _(be) a little smaller.7(2014浙江金麗衢十二校第二次聯(lián)考)The upset mother thought to herself, “If only I _(know) whats going on in my little boys head right now.”8(2014安徽安慶二模)Had Yeats stopped writing at age 40, probably he _(be) valued as a minor poet now.9(2014遼寧沈陽一模)It _(be) cool if I won this contest. I dont
25、 think Im good enough, though.Give it a shot. You never know.10(2014遼寧大連三中期末)Did you make it at last?Yes. But for your help, it _ (cause) a serious loss.11(2014湖南湘中名校一聯(lián))Max looks nervous.So _ you if you had so fierce a competiton.12(2014浙江湖州八校二次聯(lián)考)Its a shame that you missed the lecture on the Briti
26、sh culture given by Thompson.I _(attend) it, but I was busy preparing for the coming exam.13(2014湖南師大附中一次月考)They could have escaped from the big fire, but unfortunately, someone _ (lock) the door.14(2014湖南衡陽八中月考)Our company will organize a trip to Hong Kong next month. I am taking my mother there.Id
27、 rather you _(do). After all she has just recovered from her illness and she still feels weak.15(2014湖南長(zhǎng)沙雅禮中學(xué)月考)We _(finish) the project on time without your timely help.16(2013遼寧大連雙基測(cè)試)If the world had ended on Dec. 21st, 2012, we _ (be) able to enjoy the wonderful life now.17(2013吉林延吉質(zhì)檢)The Antarc
28、tic is so mystically described by some people. If only I _(be) there before!18(2013北京東城一模)I wish I _(share) the car journey home with my friends. Now they are watching the football match at home.19(2013遼寧大連二十四中期末)Mum, can I watch the TV program for another twenty minutes?Sorry, dear, its time you _(
29、go) to bed.20(2013安徽名校聯(lián)考)I cant thank you too much for your help. Without it I _(succeed) in finding my lost son.答案與解析1would have spent句意：本來你要花一大筆錢給負(fù)責(zé)幫你找寵物的那家機(jī)構(gòu)的，(但)這個(gè)志愿者服務(wù)機(jī)構(gòu)幫你省下了這筆錢。根據(jù)主句的時(shí)態(tài)和句中的otherwise 判斷，這里表示與過去事實(shí)相反的假設(shè)，定語從句中用would have done 表示“本來要做某事”。2should have remained句意：這些話剛一說出口，他就意識(shí)到自己本該保持沉
30、默的。由句意可知，此處是對(duì)已經(jīng)發(fā)生的動(dòng)作的虛擬，故用should have done，表示“本該做(但沒有做)某事”。3had forgotten句意：如果你在寄申請(qǐng)的時(shí)候忘記發(fā)送一篇論文會(huì)怎么樣？我會(huì)被拒絕的。根據(jù)答語可知，問句表示與過去事實(shí)相反的假設(shè)，故應(yīng)用過去完成時(shí)。4should have faced句意：我們是好朋友，本該一起面對(duì)這個(gè)問題的，可是你為什么不告訴我？題干中的but表明這里說的是與過去事實(shí)相反的假設(shè)，故用should have faced。5(should) stand此處suggest 表示“建議”，此時(shí)that 引導(dǎo)的賓語從句應(yīng)用虛擬語氣，謂語動(dòng)詞用“should動(dòng)詞
31、原形”，且should 可以省略。6were句意：你喜歡這個(gè)學(xué)校嗎？是的。我只希望我們的班級(jí)小一些。在wish 后的賓語從句中，謂語動(dòng)詞要用虛擬語氣，此處表示對(duì)現(xiàn)在情況的一種假設(shè)，謂語動(dòng)詞要用過去式。7knewif only 表示“要是就好了”，謂語動(dòng)詞使用虛擬語氣。根據(jù)“right now”可知，此處表示對(duì)現(xiàn)在的虛擬，因此謂語動(dòng)詞用過去式。8would be句意：假設(shè)Yeats 在40歲時(shí)就不寫詩了，那么現(xiàn)在他或許就會(huì)被評(píng)價(jià)為一位名不見經(jīng)傳的詩人了。從句意看，狀語從句敘述的是與過去事實(shí)相反的假設(shè)，從句使用了過去完成時(shí)，而主句的時(shí)間狀語now 表示這里敘述的是與現(xiàn)在事實(shí)相反的結(jié)果，應(yīng)用“wou
32、ld動(dòng)詞原形”。9would be句意：我要是能贏這場(chǎng)比賽就太好了。但是我想我不夠出色。試試看，很難說。通過句意和won得知，本句為表示將來的虛擬，所以設(shè)空處填would be。10would/could have caused句意：最后你成功了嗎？是的，要不是你的幫助，將/可能會(huì)有很大的損失。本句為與過去事實(shí)相反的假設(shè)，所以可用should/would/could/might have done 的形式。但should常用于第一人稱，might 常用于可能性很小。11would句意：馬克斯看上去很緊張。如果是你參加這么激烈的比賽，你也會(huì)緊張的。本句中主句和if 條件從句都表示和現(xiàn)在事實(shí)相反的
33、假設(shè)，可改為：You would also look nervous if you had so fierce a competiton.然后考慮采用“sobe動(dòng)詞/助動(dòng)詞/情態(tài)動(dòng)詞主語”句型替換主句形式。12would/should have attended句意：真遺憾你錯(cuò)過了湯普森所作的有關(guān)英國(guó)文化的講座。我本想/應(yīng)該參加的，但是我正忙于準(zhǔn)備即將到來的考試。根據(jù)題干中的was busy 可知設(shè)空處表示與過去事實(shí)相反，故答案為would/should have attended。13had locked句意：他們本可以從大火中逃出來，但不幸的是，有人把門鎖上了。根據(jù)題干中“could ha
34、ve escaped”可判斷該句為與過去事實(shí)相反的虛擬語氣，故設(shè)空處表示過去；lock 先于could have escaped，即表示“過去的過去”，故用過去完成時(shí)態(tài)。14didnt句意：我們公司下個(gè)月將組織到香港旅游，我打算帶我媽媽去那里。我寧可你不帶她，畢竟她剛剛從病中恢復(fù)，身體還很虛弱。would rather 接從句的時(shí)候，從句的謂語用一般過去時(shí)表示對(duì)現(xiàn)在或?qū)淼奶摂M。15wouldnt/couldnt have finished句意：如果沒有你的及時(shí)幫助，我們就不能按時(shí)完成那項(xiàng)工程了。without your timely help 相當(dāng)于含蓄條件從句，即if it hadnt b
35、een for your timely help，是和過去事實(shí)相反的虛擬語氣，故句子謂語動(dòng)詞用wouldnt/couldnt have done 形式。16wouldnt be句意：如果世界在2012年12月21日滅亡了的話，我們現(xiàn)在就不會(huì)享受精彩的生活了。if 從句與過去事實(shí)相反，而主句與現(xiàn)在事實(shí)相反，故答案為wouldnt be。17had been句意：南極地區(qū)被一些人描述得很神奇。我要是去過那里就好了！If only句子(過去完成時(shí))，表示與過去相反的假設(shè)。18had shared句意：我要是和朋友拼車回家就好了?，F(xiàn)在他們都在家看足球賽了。在I wish 后的賓語從句中，如果表示與過去
36、事實(shí)相反的假設(shè)，時(shí)態(tài)要用過去完成時(shí)。19went/should go句意：媽媽，我可以再看20分鐘電視節(jié)目嗎？對(duì)不起，寶貝，你該睡覺了。根據(jù)its time that從句(did/should do)可知填went/should go。20wouldnt/couldnt have succeeded句意：我對(duì)你的幫助怎么感謝也不為過。沒有你的幫助，我就找不到丟失的兒子。cant 與 too/too much/enough 連用，意為：再也不為過。根據(jù)句意可知空處為與過去事實(shí)相反的虛擬語氣，其謂語的形式為：would/couldhave過去分詞。創(chuàng)新預(yù)測(cè)1The doctor recommend
37、ed that you _ not swim after eating a large meal.2If only I _(have) more confidence in the English speech contest held last week!3How I wish I _(be) free now!4_ it rain tomorrow, we would have to put off the visit to the Yangpu Bridge.5If I were young, I _(take) part in this camp.6My teacher urged I
38、 _(keep) a diary to improve my writing skills.7Id rather he _(go) to the seaside with me the day before yesterday.8My suggestion is that we _ (put) up our tents before dark.9Its vital that we _(take) our safety driving along the road seriously.10Its high time that she _(get) down to writing her grad
39、uation paper.11We had great fun on the beach last weekend.Really? How I wish I _ (go) there with you.12If my father _ (be) here yesterday, he would have stopped me from going surfing.13My sister insisted I _ (accompany) her to the supermarket.14But for her timely help, I _ (drown) in the river.15I w
40、as too busy with my coming exam. Otherwise, I _ (attend) your birthday party.16I made a suggestion that he _ (set) aside some money for later use.17We were caught in the heavy rain. If only we _ (stay) at home.18If he had seen the film, he _ (tell) me about it.19The teacher recommended I _ (pay) att
41、ention to protecting my eyesight.20My grandmother required that I _ (form) the good habit of being polite.答案與解析1shouldrecommend 后的賓語從句用虛擬語氣(should)do。2had hadIf only 與虛擬語氣連用，表示與過去事實(shí)相反用過去完成時(shí)。3wereI wish 與虛擬語氣連用，表示與現(xiàn)在事實(shí)相反用一般過去時(shí)，be 動(dòng)詞一律用were。4Should虛擬條件句用should do，省略if, should 提到句首，意為“萬一”。5would take虛擬
42、條件句表示與現(xiàn)在事實(shí)相反，從句用一般過去時(shí)，主句用would do。6(should) keepurge 后的賓語從句用虛擬語氣(should)do。7had goneId rather. 從句中用虛擬語氣，表示與過去事實(shí)相反，用過去完成時(shí)。8(should)putsuggestion 等后的同位語從句或表語從句中用虛擬語氣(should)do。9(should)takeIts vital that. 從句中用虛擬語氣(should)do。10got/should getIts(high) time that. 從句中用虛擬語氣表示與現(xiàn)在事實(shí)相反用一般過去時(shí)或should do，should
43、不可以省略。11had goneI wish 后的賓語從句用虛擬語氣，表示與過去事實(shí)相反，用過去完成時(shí)。12had been虛擬條件句表示與過去事實(shí)相反時(shí)，從句用過去完成時(shí)，主句用 would have done。13(should) accompanyinsist 意為“堅(jiān)持要求”時(shí)，其后從句用虛擬語氣(should) do。14would have been drownedbut for.與虛擬語氣連用，表示與過去事實(shí)相反，用 would have (been) done。15would have attendedotherwise 與虛擬語氣連用，表示與過去事實(shí)相反，用 would have done。16(should) setsuggestion 后的同位語從句用虛擬語氣(should) do。17had stayedif only 與虛擬語氣連用，表示與過去事實(shí)相反，用過去完成時(shí)。18would have told虛擬條件句與過去事實(shí)相反，主句用 would have done。19(should) payrecommend 后的賓語從句用虛擬語氣(should) do。20(should) formrequire 后的賓語從句用虛擬語氣(should) do。7
【紅對(duì)勾 講與練】（新課標(biāo)）2021年高三英語二輪專題復(fù)習(xí) 專題十 虛擬語氣課時(shí)作業(yè)10（含解析）
