【優(yōu)化方案】2014屆高考（新課標(biāo)版）一輪復(fù)習(xí)選修六　unit 5　the power of nature教師配套課件

1、Unit 5　The power of nature——大自然的力量,,,本節(jié)目錄,,基礎(chǔ)盤點(diǎn)自測(cè)自評(píng),考點(diǎn)串講講練互動(dòng),[核心單詞]1．____________ n．火山2．_____________ adv.在旁邊;沿著邊prep.在……旁邊;沿著……的邊3．________n．波浪;波濤vi.波動(dòng);起伏;揮手4．___________n．潛在性;可能性;潛能adj.可能的;潛在的5．___________vt.射中;射

2、傷6．_________adj.多種多樣的;不同的7．___________ vt.保證;擔(dān)保8．________ vi.(指火山)爆發(fā);突然發(fā)生→eruption n．火山爆發(fā);(戰(zhàn)爭(zhēng)等)爆發(fā),volcano,alongside,wave,potential,shoot,diverse,guarantee,erupt,9．__________vt.任命;委派→appointment n．約定;任命10．__________vt

3、.評(píng)估;評(píng)價(jià);估計(jì)→evaluation n．評(píng)估11．___________ adj.絕對(duì)的;完全的→absolutely adv.絕對(duì)地;完全地12．________ n．一套外衣;套裝vt.適合;使適宜→suitable adj.合適的13．_________adj.實(shí)在的;實(shí)際的→actually adv.實(shí)際地14．___________ adj.憂慮的;不安的→anxiously adv.不安地→anxiety n．

4、擔(dān)心;焦慮;渴望15．___________ vi.&vt.驚慌n.驚慌;恐慌→panicked(過去式/過去分詞)16．_____________n．欣賞;感激;感謝→appreciate vt.欣賞;感激,appoint,evaluate,absolute,suit,actual,anxious,panic,appreciation,[高頻短語(yǔ)]1．_________________　前往2．___________

5、____ 匆匆看一遍3．_______________ 由……到……不等4．____________ 生產(chǎn);產(chǎn)生5．____________________ 與……相比6．_________________ 保護(hù)……免受……傷害7．___________________ 被委派為……8．______________________ 全部焚毀9．___________________ 即將做某事;馬上就要做某事

6、10．__________查閱,參考,指的是,make one’s way,glance through,vary from...to...,give birth to,be compared with...,protect...from...,be appointed as...,burn to the ground,be about to do sth.,refer to,[典型句式]1．現(xiàn)在分詞的完成時(shí)作狀語(yǔ)①________

7、___________ and evaluated the information, I help other scientists to predict where lava from the volcano will flow next and how fast.收集和評(píng)估這些信息之后,我就幫助其他科學(xué)家一起預(yù)測(cè)熔巖接著將往何處流,流速是多少。②__________________ volcanoes now for many

8、years,I am still amazed at their beauty as well as their potential to cause great damage.我現(xiàn)在已經(jīng)從事火山研究多年了,但我仍然驚羨于它們的美麗以及它們潛在的巨大破壞性。,Having collected,Having studied,2．be about to...when...正要做……這時(shí)…… I _________________go ba

9、ck to sleep _________suddenly my bedroom became as bright as day.我剛要再睡,突然我的臥室亮如白晝。3．“being ＋ 名詞”型的獨(dú)立主格結(jié)構(gòu)The other two climbed down into the crater to collect some lava for later study,but this_________________________

10、,I stayed at the top and watched them.另外兩人爬下火山口去收集供日后研究用的巖漿,我是第一次經(jīng)歷這樣的事,所以留在山頂上觀察他們。,was about to,when,being my first experience,4．it is/was said that...據(jù)說(shuō)……_____________this boy, who had a great gift for languages an

11、d persuasion, is the father of the Manchu people.據(jù)說(shuō)這個(gè)男孩就是滿族人的祖先,他具有語(yǔ)言天賦和很強(qiáng)的說(shuō)服力。5．compared with/to與……相比Have you ever considered how weak humans are _______________a volcano, hurricane or earthquake？你有沒有想過,與火山、颶風(fēng)和地震相比起

12、來(lái),人類是多么軟弱呢？,It is said that,compared with,[單元語(yǔ)法]v．-ing形式1．(2012·北京海淀二模)She came to Beijing on April 28,________ May Day’s concert in the Bird’s Nest.A．to expect B．expectingC．expected D．expect解析：選B?？疾榉侵^語(yǔ)動(dòng)詞作

13、狀語(yǔ)。句意：四月二十八日,她來(lái)到北京,期待著在鳥巢舉辦的五一勞動(dòng)節(jié)音樂會(huì)的到來(lái)。由題干中的逗號(hào),可排除A項(xiàng);空格處應(yīng)填非謂語(yǔ)動(dòng)詞,故排除D項(xiàng)。主語(yǔ)she與expect之間是邏輯上的主謂關(guān)系,故排除C項(xiàng),選B項(xiàng),作伴隨狀語(yǔ)。,2．(2013·安徽省皖北聯(lián)考)Some drivers are warning the vehicles ________ behind them, such as“Don’t follow me, I

14、 lost my way too” and “Be off.I’m married”．A．to run B．runningC．having run D．having been run解析：選 B?？疾榉侵^語(yǔ)動(dòng)詞。分析句子結(jié)構(gòu)可知,“the vehicles”與“run”之間構(gòu)成邏輯上的主謂關(guān)系,所以用run的現(xiàn)在分詞形式;又根據(jù)句中的時(shí)態(tài)可知,應(yīng)用run的現(xiàn)在分詞的一般式。,3．(2013·江西豐、樟、高、

15、宜四市聯(lián)考)________all the doors were locked,Mr.Smith left for London on holiday.A．Checking B．CheckedC．To check D．Having checked解析：選D。句意：確定所有門都鎖好之后,史密斯先生就去倫敦度假了。check這個(gè)動(dòng)作發(fā)生在left之前,故用現(xiàn)在分詞的完成式在句中作狀語(yǔ)。,4．(2013·皖南八校高三

16、聯(lián)考)Shenzhou Ⅷ has docked with Tiangong-1 successfully,________ the start of the establishment of China’s own space station.A．marked B．to markC．marking D．having marked解析：選C。考查非謂語(yǔ)動(dòng)詞。句意：神州八號(hào)和天宮一號(hào)的成功對(duì)接標(biāo)志著中國(guó)建立自己空間站的開

17、始。mark作為及物動(dòng)詞意為“標(biāo)志著”,其邏輯主語(yǔ)就是前面整句話,故應(yīng)該用現(xiàn)在分詞的一般主動(dòng)式作為伴隨狀語(yǔ),表示其動(dòng)作與前面句子謂語(yǔ)動(dòng)作幾乎同時(shí)發(fā)生。D項(xiàng)表示其動(dòng)作發(fā)生在句子謂語(yǔ)動(dòng)作之前,不符合句意。,5．(2013·綿陽(yáng)市診斷)________the youth to the rising sun at 8 or 9 o’clock a．m.,Mao Zedong expressed his great hope for t

18、he young men.A．Compared B．To compareC．Compare D．Comparing解析：選D。考查非謂語(yǔ)動(dòng)詞。從句意和結(jié)構(gòu)上可以看出compare與主語(yǔ)Mao Zedong是主動(dòng)關(guān)系,因此用現(xiàn)在分詞comparing。,[單詞精研]1.appoint　vt. 約定;指定(時(shí)間、地點(diǎn)等),任命;委任(牛津P82)They have appointed a new headmaster at

19、 my son’s school.　我兒子讀書的學(xué)校任命了一位新校長(zhǎng)。,①It is out of question that he will be appointed Chief Engineer of the railway.毫無(wú)疑問,他將被任命為那條鐵路的總工程師。②I have the pleasure of announcing the news that she has been appointed as the new

20、 Sales Manager at Head Office.我很高興地宣布這個(gè)消息,她已被任命為總公司的新的銷售經(jīng)理。 ③(牛津P82)She made an appointment for her son to see the doctor.她為兒子約定了看醫(yī)生的時(shí)間。,2.suit　n. 一套外衣;套裝　vt. 適合;使適宜(牛津P2022)If you want to go by bus,that suits me fin

21、e.要是你想坐公共汽車,那對(duì)我也合適。歸納拓展(1)suit sb.　　適合某人suit one’s needs 適合需要(2)a suit of clothes 一套衣服(3)suitable adj. 適當(dāng)?shù)?相配的be suitable for sb./sth. 適合于某人/某物be suitable to do sth. 適合做某事,①A good teacher suits his lesson t

22、o the age of his pupils.一位優(yōu)秀的老師應(yīng)使他講的課適合學(xué)生的年齡。②(2011·高考遼寧卷·完形填空)I asked a young lady if she had seen a little boy in a grey suit.我問一位年輕女子她是否看見一個(gè)穿灰色外套的小男孩。③(2011·高考天津卷·閱讀理解A)This kind of accommodatio

23、n offers an independent lifestyle and is more suitable for the long­stay student.這種住宿方式提供獨(dú)立的生活方式,它更適合于長(zhǎng)期居住的學(xué)生。,[易混辨析] suit,match,fit,[巧思妙解]用suit,match,fit填空(1)Her shoes ____________ her dress;they look very wel

24、l together.(2)It is almost impossible to find a time that __________ everybody.　(3)The colour of this pair of shoes __________ me very well,but it doesn’t fit me.,match,suits,suits,3.panic　vi.& vt.(使人或動(dòng)物)受驚;驚慌(過去式與

25、過去分詞都為panicked;現(xiàn)在分詞為panicking)　 n. 驚慌;恐慌(教材P38)I felt very nervous and had to force myself not to panic.　我非常緊張,不得不強(qiáng)迫自己不要驚慌。,①Shoppers are panicked into buying things they don’t need.購(gòu)物者因恐慌,搶購(gòu)一些他們并不需要的東西。②I panicked whe

26、n I saw smoke coming out of the engine.我看見發(fā)動(dòng)機(jī)冒煙時(shí),嚇得手足無(wú)措．③She got into a real panic when she thought she’d lost the ticket.她十分驚慌,以為自己已把入場(chǎng)券丟了。④The audience were thrown into a panic when the fire started.一發(fā)生火災(zāi),觀眾頓時(shí)陷入一片慌亂

27、之中。,4.guarantee　vt. 保證……免受損失或傷害;擔(dān)保 n. 保證;保證書(朗文P919)Even if you complete your training,I can’t guarantee you a job.即使你接受完培訓(xùn),我也不能擔(dān)保你會(huì)有工作。,①(朗文P919)The plan would guarantee health care to all Americans.這項(xiàng)計(jì)劃將保證所有美國(guó)人都能享

28、受醫(yī)療保健服務(wù)。②(朗文P919)Going out with friends is guaranteed to cheer you up.和朋友一起出去玩肯定會(huì)讓你高興起來(lái)。③This washing machine was guaranteed against mechanical failure— I demand a new one！這臺(tái)洗衣機(jī)出售時(shí)曾擔(dān)保過不出機(jī)械性故障——我要換一臺(tái)新的。④(朗文P919)Can you

29、 give me a guarantee that the work will be finished on time?你能向我保證工作會(huì)按時(shí)完成嗎？,5.anxious　adj.憂慮的,不安的(教材P38)I was so anxious and couldn’t move at first.我非常擔(dān)心,一開始嚇得動(dòng)彈不得。,①M(fèi)y mother always gets a bit anxious if we don’t ar

30、rive when we say we will.如果我們不能在我們所說(shuō)的時(shí)間到達(dá),母親總是有點(diǎn)焦慮。②(牛津P75)She was anxious to finish school and get a job.她渴望畢業(yè)找份工作。③I felt anxious about/was anxious about his safety when I heard the news of the train accident.當(dāng)我聽到火

31、車事故的消息時(shí),我很擔(dān)心他的安全。④(牛津P75)If you are worried about your health,share your anxieties with your doctor.你要是擔(dān)心自己的健康,就把自己的憂慮告訴醫(yī)生吧。,[跟蹤訓(xùn)練]Ⅰ.完成句子1．Small business owners ________________ (惶恐不安)over whether they will survive.

32、2．Buying a train ticket two days ahead of time will usually ___________________________(保證你有個(gè)好座位)．3．We must ________________________(任命一位新老師)at once to the mountain school.,are in a panic,guarantee you a good seat,appoi

33、nt a new teacher,4．It is reported that there are plenty of graduates ________________(渴求工作)．5．It’s still________________(在保修期內(nèi)),so the company will have it repaired.6．—How about eight o’clock outside the cinema?—That_

34、_______(適合)me fine.,anxious for work,under guarantee,suits,1．(2011·高考湖北卷)“Tommy,run！Be quick！The house is on fire！” the mother shouted,with __________ clearly in her voice.A．a(chǎn)nger　　　　　　　 B．rudenessC．regret D．

35、panic解析：選D。考查名詞辨析。句意：“湯米,快跑！快點(diǎn)！房子著火了！”媽媽大聲喊著,聲音里顯然帶著恐慌。房間著火了,媽媽叫孩子趕緊跑出去,從這些信息看,本空應(yīng)選D,表示“恐慌,驚恐”。A項(xiàng)“憤怒”;B項(xiàng)“粗魯,粗暴”;C項(xiàng)“懊悔,遺憾,抱歉”,都不符合句意。,2．(2013·濟(jì)南模擬)—He’s been working very hard and has made great progress in his fiel

36、d.—No wonder he was________president of the local hospital so soon.A．a(chǎn)ppointed B．claimedC．classified D．rewarded解析：A。考查動(dòng)詞詞義辨析。第二句句意：難怪他這么快就被任命為當(dāng)?shù)蒯t(yī)院的院長(zhǎng)。appoint意為“任命”,符合句意。claim要求,請(qǐng)求,聲稱;classify分類;reward報(bào)答,回報(bào)。,3．—Lu

37、cy,read this book—I _______that you’ll be fond of it.—OK.I’ll read it after I have finished my homework.A．order B．guaranteeC．prove D．reveal解析：選B。根據(jù)I’ll read it可知,第一說(shuō)話人是說(shuō)“露西,看看這本書,我保證你會(huì)喜歡它的。”guarantee保證,符合句意。o

38、rder命令;prove證明;reveal揭示。,4．As far as I know,you can’t ________him in the knowledge of wild plants.A．fit B．matchC．suit D．get解析：選B。句意：據(jù)我所知,在野生植物知識(shí)方面,你無(wú)法與他相比。fit,match,suit,get這幾個(gè)詞中,只有match可以指在能力、水平上“與……相配”。,5．He w

39、ants very much to go to college,but he is ________ about not passing the entrance examination.A．eager B．a(chǎn)nxiousC．patient D．worrying解析：選B。anxious強(qiáng)調(diào)“擔(dān)心,憂慮”;eager強(qiáng)調(diào)對(duì)某事的渴望,含有積極的意義;patient“耐心的”;worrying“令人擔(dān)憂的”,故只有B項(xiàng)符

40、合句意。,[短語(yǔ)精釋]1.make one’s way　前往;獲得成功(教材P35)It was not easy to walk in these suits,but we slowly made our way to the edge of the crater and looked down into the red,boiling centre.穿著這些衣服走起路來(lái)實(shí)在不容易,但我們還是緩緩?fù)鹕娇诘倪吘壸呷?并且向下看到

41、了紅紅的沸騰的中央。,歸納拓展fight one’s way　奮力前進(jìn)lose one’s way 迷路feel one’s way 摸索前進(jìn)force one’s way 強(qiáng)行前進(jìn);擠出去push one’s way 擠出來(lái)wind one’s way 蜿蜒前進(jìn),①The passengers on the bus watched with sympathy as Susan made her way

42、carefully up the steps.當(dāng)蘇珊小心走上樓梯時(shí),車上的乘客們都同情地看著她。②We managed to make our way through the excited crowd.我們奮力地從激動(dòng)的人群中擠了出來(lái)。③I’m glad that he makes his way in his career.我很高興他在事業(yè)上有所進(jìn)步。④He felt his way across the room whe

43、n the lights went out.當(dāng)燈熄滅時(shí)他摸索著走過房間。,2.vary from...to...　由……到……不等(教材P39)The land varies in height from 700 metres above sea level to over 2,000 metres and is home to a great diversity of rare plants and animals.　這里地面的高度

44、由海拔700米到2 000多米不等,是多種多樣的珍稀動(dòng)植物的生長(zhǎng)地。,①That her health varies from good to rather weak worries her family a lot.她的身體有時(shí)很好,有時(shí)又比較虛弱, 這讓家人很是擔(dān)憂。②Tail meat can be purchased fresh or frozen, with prices varying with the time of s

45、eason and supply.市場(chǎng)上有新鮮或冷凍的尾肉可供購(gòu)買,價(jià)格隨季節(jié)和供應(yīng)情況而變動(dòng)。③Some guests arrived late at the party for a variety of/various reasons.因?yàn)楦鞣N理由,有些客人晚會(huì)遲到了。,[跟蹤訓(xùn)練]Ⅰ.完成句子1．Finally she turned round and,slowly began to________________(前往)

46、back towards the house.2．The famous hotel on the corner had_________________________________(全部焚毀)before police arrived.3．There was no moonlight outside.They had to__________________________(在黑暗中摸索)．4．Opinions on thi

47、s matter ___________________________(人人觀點(diǎn)不一)．5．Many a large business __________________(已被建立) from a smaller one.,make her way,been burnt down,to the ground,feel their way in the dark,vary from person to person,has bee

48、n built up,Ⅱ.單項(xiàng)填空1．It is obvious that the hopes,goals,fears and desires________ widely between men and women,between the rich and the poor.A．transform B．strengthenC．transfer D．vary解析：選D。句意：很明顯男人和女人,富人和窮人在希望、目標(biāo)、恐

49、懼和欲望方面有很大的不同。vary between...and...由……到……的情況不等。transform“使改觀,使變形;使轉(zhuǎn)化”;strengthen“(使)變強(qiáng),加強(qiáng);使更堅(jiān)固”;transfer“轉(zhuǎn)換”。,2．If you want to __________ in the world,you must learn to work hard while you are still young.A．make much o

50、f yourself B．make the way outC．make you out D．make your way解析：選D。根據(jù)語(yǔ)境應(yīng)是“如果你想成功”,故選D。make one’s way除了可表示“到(某地),(向某地)走去”之外,還可表示“成功;有出息”。make much of sb.“重視”;make sth.out“看清;辨認(rèn)清楚”;make sb.out “看透;弄懂某人”.,3．Knowing tha

51、t his brother is waiting for him at the station,he made his ________there immediately.A．way B．decisionC．judge D．preparation解析：選A。考查短語(yǔ)make one’s way。該短語(yǔ)意為“到某地;向某地走去”。句意：得知他的兄弟在車站等他,他立即前往那里。從題干中there一詞可看出A項(xiàng)符合語(yǔ)境。,[

52、句型精析]1.(教材P39)It is said that this boy,who had a great gift for languages and persuasion,is the father of the Manchu people.　據(jù)說(shuō)這個(gè)男孩就是滿族人的祖先,他具有語(yǔ)言天賦和很強(qiáng)的說(shuō)服力。[句法分析](1)It is said that...意為“據(jù)說(shuō)……”,it為形式主語(yǔ),指代that 引導(dǎo)的從句.該結(jié)構(gòu)還可

53、以改變成sb.is said to do...結(jié)構(gòu).使用時(shí)注意不定式的一般式、進(jìn)行式或完成式在結(jié)構(gòu)上的變化.①It is said that a new shopping mall will be built in the city next year.→A new shopping mall is said to be built in the city next year.據(jù)說(shuō)該市明年要建一家新商場(chǎng)。,②It is said t

54、hat a new shopping mall is being built in the city at present.→A new shopping mall is said to be being built in the city at present.據(jù)說(shuō)該市目前正在建一家新商場(chǎng)。③It is said that a new shopping mall was built in the city the other da

55、y.→A new shopping mall is said to have been built in the city the other day.(據(jù)說(shuō)“已經(jīng)……”)據(jù)說(shuō)幾天前一家新商場(chǎng)在該市落成了。,歸納拓展 It is thought that...　　　　　　　人們認(rèn)為……It is believed that... 人們相信……It is hoped that... 人們希望……It is reported

56、 that... 據(jù)報(bào)道……It is well-known that... 眾所周知……It is generally considered that... 大家認(rèn)為……It is supposed that... 據(jù)推測(cè),④It is believed that at least a score of buildings were damaged or destroyed.人們相信,至少有20座樓房遭到破壞或徹底被摧

57、毀。⑤It is hoped that the terrible disease will soon be controlled.人們希望這種可怕的疾病能迅速得到控制。,2.(教材P34)Having collected and evaluated the information,I help other scientists to predict where lava from the volcano will flow next

58、and how fast.收集和評(píng)估了這些信息之后,我就幫助其他科學(xué)家來(lái)預(yù)測(cè)熔巖接著將往何處流去,流速是多少。,[句法分析]having collected and evaluated the information是現(xiàn)在分詞的完成式在句中作狀語(yǔ),表明從句動(dòng)作發(fā)生在主句動(dòng)作之前。①Having answered the teacher’s questions,she sat down and felt much more rela

59、xed.回答完老師的問題后,她坐下來(lái),感到輕松多了。②Having been separated from other continents for millions of years,Australia has many plants and animals not found anywhere else in the world.由于與其他的大洲分離了幾百萬(wàn)年了,澳大利亞有許多在世界上其他地方都找不到的動(dòng)植物。,【溫馨提示】　

60、過去分詞作狀語(yǔ)同現(xiàn)在分詞作狀語(yǔ)時(shí)一樣,其邏輯上的主語(yǔ)就是主句的主語(yǔ),但所不同的是,過去分詞與主語(yǔ)之間存在被動(dòng)關(guān)系,但有時(shí)無(wú)被動(dòng)意味,只是表示一種狀態(tài)或動(dòng)作的完成,而現(xiàn)在分詞與主語(yǔ)之間存在著主動(dòng)關(guān)系。,③Given better attention,the flowers could have grown better.要是照看得好一點(diǎn),這些花會(huì)長(zhǎng)得更好。④Seeing the photo,he couldn’t help thinki

61、ng of his good old days.看到那張照片,他禁不住想起了美好的往昔。,3.(教材P35)The other two climbed down into the crater to collect some lava for later study,but this being my first experience,I stayed at the top and watched them.另外兩人攀下火山口去收集供

62、日后研究用的巖漿,我是第一次經(jīng)歷這樣的事,所以留在山頂上觀察他們。[句法分析]this being my first experience 是獨(dú)立主格結(jié)構(gòu)。其主要的構(gòu)成方式如下：(1)獨(dú)立分詞結(jié)構(gòu)：名稱或代詞主格＋分詞①He was listening attentively in class,his eyes fixed on the blackboard.他上課專心聽講,眼睛緊盯著黑板。②The guide leading

63、 the way,we had no trouble getting out of the forest.向?qū)ьI(lǐng)著路,我們毫不費(fèi)力地走出了森林。,(2)名稱或代詞主格＋不定式③More presents to be given, she will find it difficult to accept.再多給她一些禮物,她就會(huì)覺得很難接受。(3)名稱或代詞主格＋形容詞(副詞、名詞、介詞短語(yǔ))④Two hundred people

64、died in the accident, many of them are children.兩百人死于事故,其中有許多兒童。⑤There being no one else to turn to,I had to come to see you.我沒有其他可以求助的人,只能來(lái)找你。,[跟蹤訓(xùn)練]1．(2013·浙江重點(diǎn)中學(xué)調(diào)研)________in a new country,I was scared and feel

65、ing pretty anxious.A．For the first time B．I was the first timeC．Being the first time D．This being my first time解析：選D。句意：這是我第一次待在一個(gè)新國(guó)家,我感到害怕而且很擔(dān)心。逗號(hào)前后的兩個(gè)句子之間沒有連接詞或引導(dǎo)詞,所以判斷逗號(hào)前為獨(dú)立主格結(jié)構(gòu)：this being my first time＝because

66、 this was my first time。,2．(2012·瀏陽(yáng)一中高三第三次考試)The old woman sat alone in the room,in which there wasn’t much furniture, eyes ________on the opposite wall.A．fixed B．fixingC．had been fixed D．were fixing解析：選A。

67、考查獨(dú)立主格結(jié)構(gòu)。fix和eyes是動(dòng)賓關(guān)系,所以要用被動(dòng)形式,故排除B和D項(xiàng);逗號(hào)前面出現(xiàn)了in which there wasn’t much furniture,如果將其刪掉,則不難看出,逗號(hào)前面已經(jīng)存在了sat這個(gè)動(dòng)詞,所以此空不能再用動(dòng)詞形式,C排除.,3．(2013·南昌市高三模擬)Nuclear radiation is said ________ the biggest health challenge in

68、Japanese Earthquake over the last year.A．being B．to beC．to have been D．that it is解析：選C。句意：在過去的一年里,據(jù)說(shuō)日本地震中的核輻射對(duì)健康是最大的挑戰(zhàn)。謂語(yǔ)動(dòng)詞中使用了be said...結(jié)構(gòu),其后要用動(dòng)詞不定式,同時(shí)該動(dòng)作發(fā)生在過去,所以應(yīng)用不定式的完成式。故正確答案為C。,4．It is often ________that h