必修3 Unit 2知識(shí)點(diǎn)解析及練習(xí)

1、必修3Unit 2Healthy eating要 點(diǎn) 梳 理高效梳理知識(shí)備考重點(diǎn)單詞1diet n日常飲食 vi.節(jié)食2balance vt.平衡；權(quán)衡 n天平；平衡balanced adj.均衡的3fry vt. & vi.油煎；油炸4curiosity n好奇心curious adj.好奇的5raw adj.生的；未加工的6lie vi.說(shuō)謊；n.謊話；謊言liar n說(shuō)謊者7customer n顧客；消費(fèi)者8discount n折扣9weakness n缺點(diǎn)；虛弱；弱點(diǎn)weak adj.虛弱的weaken v使變?nèi)?0strength n力；力量；強(qiáng)項(xiàng)；長(zhǎng)處strengthen v加強(qiáng)，

2、強(qiáng)化11consult vt.咨詢；請(qǐng)教；商量12digest v消化，吸收 n消化，吸收；文摘，摘要digestion n消化力，領(lǐng)悟13debt n債；債務(wù)14glare vi.怒目而視；閃耀n.怒視；眩目的光15limit n界限；限度 vt.限制；限定limited adj.有限的16benefit n利益；好處 vt. & vi.有益于；有助于；受益beneficial adj.有利的，有益的17sigh vi.嘆息；嘆氣n.嘆息；嘆息聲18combine vt. & vi.(使)聯(lián)合；(使)結(jié)合combination n聯(lián)合，結(jié)合重點(diǎn)短語(yǔ)1be/go on a diet 節(jié)食2ou

3、ght to 應(yīng)當(dāng)；應(yīng)該3lose weight 體重減輕；減肥4get away with 被放過(guò)；(做壞事)不受懲罰5tell a lie 說(shuō)謊6win.back 贏回；重新獲得7earn ones living 謀生8in debt 欠債9spy on 暗中監(jiān)視；偵察10cut down 削減；刪節(jié)11before long 不久以后12put on weight 增加體重13glare at 怒視14benefit from 受益于15throw away 扔掉；丟棄重點(diǎn)句型1Nothing could be better. 再?zèng)]有比這更好的了2He could not have Yo

4、ng Hui getting away with telling people lies! 他可不能讓詠慧哄騙人們后跑掉！3Why dont you sit down and try a meal? 你為什么不坐下來(lái)吃頓飯呢？4According to my research, neither your restaurant nor mine offers a balanced diet.我的研究表明，你我兩家所提供的都不是平衡膳食?？?點(diǎn) 探 究互動(dòng)探究能力備考.詞匯短語(yǔ)過(guò)關(guān)1diet n日常飲食vi. 節(jié)食be/go on a dietput sb. on a diet用規(guī)定的食譜，控制飲

5、食a diet of sth. 多得令人生厭的事物(1)_ is not good for you.太油膩的食物對(duì)你不利。(2)The doctors all suggest I _ .醫(yī)生們都建議我節(jié)食。Too rich a dietgo on a diet比較：diet 既可指習(xí)慣上常用的食品，又可指規(guī)定的食物，特指維持健康的定質(zhì)定量的食物；food是“食物”的一般用語(yǔ)，指任何能吃的且有營(yíng)養(yǎng)的東西。2balance vt.&vi.&n.平衡balanced adj. 平穩(wěn)的，安定的，和諧的in the balance 懸而未決the balance of forces 力量對(duì)比out of

6、 balance 失去平衡keep ones balance 保持平衡，保持鎮(zhèn)靜lose ones balance 失去平衡，失去鎮(zhèn)靜throw sb. off the balance 使某人失去平衡，使某人慌亂balance the good and evil of things 權(quán)衡事物的好壞兩方面 (1)We must _ the good and evil of things.我們必須權(quán)衡事物的好壞兩個(gè)方面。(2)The acrobat _ on the high rope.雜技演員在高處的繩子上使自己保持平衡。(3)It is difficult to _ on an icy pav

7、ement.人行道上結(jié)了冰，要想不摔倒可不容易。(4)How long can you _ on one foot?你能單腳站立多久？Balance balanced himself keep ones balance balance 3lie n謊話；謊言 vt.&vi.說(shuō)謊；躺，處于(某位置)tell a lie/lies 說(shuō)謊tell the truth 說(shuō)實(shí)話a white lie 善意的謊言lie to sb.向某人撒謊lie in 在于；處于lie down 躺下；屈服lie on ones side/back/stomach 側(cè)臥/仰臥/俯臥There lies. 某地有提示：易

8、混詞形變化：lie撒謊liedlied 躺laylainlying lay 放；產(chǎn)卵laidlaidlaying(1)The boy must be a spy and was _.這男孩子一定是個(gè)間諜且在說(shuō)謊。(2)You are _ and lies cannot cover up facts.你在說(shuō)謊，但謊言掩蓋不了事實(shí)。(3)He was _ in the shade of the tree.他正躺在樹(shù)蔭下。(4)The factory _ the west of the town. 工廠在鎮(zhèn)的西邊。telling a lie lying lying lies to(5)Dont _

9、your coat on the bed.不要把你的外衣放在床上。(6)Birds, fishes, and insects _.鳥(niǎo)下蛋，魚(yú)和昆蟲(chóng)產(chǎn)卵。Lay lay eggs4consult vt.&vi. 向咨詢；查閱consultant n會(huì)診醫(yī)生；顧問(wèn)consulting adj. 咨詢的；顧問(wèn)的consult sb. about sth. 向某人請(qǐng)教某事consult a book (a dictionary )查書(shū)(字典)consult with sb. 同某人商量a consulting engineer 顧問(wèn)工程師(1)Youd better _ a doctor _ your

10、 illness.你最好找醫(yī)生咨詢一下你的病情。(2)Before a decision has been made, youd better _. 在作決定之前，最好找你父親商量一下。(3)When you take a geography exam, you may _.參加地理考試時(shí)，你可以查閱地圖。(4)He is _ his advisor.他正同他的顧問(wèn)磋商事情。 Consult about consult your father consult a map consulting with5limit n界限；限度v限制；限定limited adj. 有限的limitation n

11、. 限制；限制條件，不足之處go beyond/over the limit 超過(guò)限度within limits 在一定范圍內(nèi)；有限度的within the limits of 在的范圍內(nèi)without limit 無(wú)限(制)地set a limit to sth. 對(duì)規(guī)定限度be limited to sth. 受限制于limit sth. to sth. 把限定在的范圍內(nèi)(1)Ive _ 1 000 calories a day to try to lose weight.我試著減肥，限定自己每天攝入1 000卡的熱量。(2)A wise man knows his own _.人貴有自知

12、之明。(3)As we all know, a persons life is _， but knowledge is _.As we all know, there is _ a persons life but _ knowledge.我們都知道，人的生命是有限的，而知識(shí)卻是無(wú)限的。limited myself to limitations limited unlimited a limit to no limit to6benefit n利益，實(shí)惠；優(yōu)越性 vt.&vi.得益；使受益benefit sb./someplace 使某人/某地受益benefit from/by sth.rec

13、eive/gain benefit from sth.得益于某事be of great/much benefit to sb.be very beneficial to sb. 對(duì)某人有好處for the benefit of.為了幫助；為了的利益(1)The new hospital will _the entire community.這所新醫(yī)院將使整個(gè)社區(qū)受益。(2)I _ much _ my fathers advice.我從父親的建議中獲益頗多。(3)Moderate exercise will be _ you.適度運(yùn)動(dòng)對(duì)你有很多益處。(4)She went there _ her

14、 health.她為了健康而去了那里。Benefit benefited from of much benefit to for the benefit of7combine vt. & vi. (使)聯(lián)合；(使)結(jié)合combination n. 結(jié)合；聯(lián)合；化合(物)combine into. 聯(lián)合成combine.with. 把與結(jié)合起來(lái)a combination of. 一種的結(jié)合(物)in combination with 與聯(lián)合起來(lái)(1)Some films _ education _ recreation.有些電影把教育與娛樂(lè)結(jié)合起來(lái)。(2)The two small shops

15、_ to make a large one.這兩個(gè)小店合并起來(lái)成為了一個(gè)大商店。(3)Pink is _ red and white.粉紅色是紅色與白色的混合色。Combine with combined a combination of8get away with 被放過(guò)；(做壞事)不受懲罰get rid of 擺脫；除去get about 走動(dòng)；旅行；(消息等)傳開(kāi)來(lái)get across (使)被理解；(把)講清楚get on/along well with. 與相處得好；進(jìn)展得好get away from 逃脫；離開(kāi)get down (從)下來(lái)；寫(xiě)下；使沮喪get down to doi

16、ng sth. 開(kāi)始認(rèn)真地做某事get in 收獲；插話get in touch with 與取得聯(lián)系get into the habit of 染上的習(xí)慣get into trouble 陷入困境get out (of.) (使)出去；離開(kāi)；逃脫；擺脫get over 爬過(guò)(墻等)；克服(困難等)；從中恢復(fù)過(guò)來(lái)get through 辦完；花完(錢(qián)、時(shí)間等)；(使)通過(guò)；接通電話(1)I wont have you _ cheating in the exam.我不能容忍你考試作弊而不受懲罰。(2)He was so lucky to _ only a fine for such a ser

17、ious mistake.他犯了如此嚴(yán)重的錯(cuò)誤，僥幸只被罰款了事。(3) How can I _ the flies in the kitchen？我怎樣才能把廚房里的蒼蠅消滅掉？(4)Hes not very good at _ his ideas _.他不太善于清楚地表達(dá)自己的思想。getting away with get away with get rid of getting across9in debt負(fù)債be in heavy debt負(fù)債累累be in debt to sb.欠某人債pay off all the debts還清債務(wù)(動(dòng)作)be out of debt不欠債(狀

18、態(tài))get/run into debt陷入債務(wù)(1)In my opinion, the elegant woman with long hair cant have been _.在我看來(lái)，那位優(yōu)雅的長(zhǎng)發(fā)女士不可能負(fù)債累累。(2)Being _ makes Tom a light mood.還清了債務(wù)使得湯姆心情輕松。(3)The couple worked hard day and night in order to _.為了還清所有的債務(wù)，這對(duì)夫婦夜以繼日地拼命干活。 in heavy debt out of debt pay off all their debts10cut down

19、砍倒，使倒下；削減，壓縮；減價(jià)(1)He used to _ trees, but he plants trees now.他過(guò)去砍樹(shù)，而現(xiàn)在植樹(shù)。(2)I have to _.我得少抽煙。(3)AIDS _ at an early age.艾滋病較早地奪去了他的生命。(4)He was asking $100 for the vase, but I _ $75.這個(gè)花瓶要價(jià)100美元，但我砍到了75美元。cut down cut down smoking cut him down cut him down to拓展：cut across走捷徑，穿過(guò)去cut in插話；讓某人分享利潤(rùn)cut o

20、ff中止，切斷；隔絕cut out刪除；裁剪cut up劈碎，切碎；使難過(guò)；(嚴(yán)重地)割傷cut short突然停止，中斷(活動(dòng))cut through穿過(guò)；克服；避開(kāi)；剪斷.重點(diǎn)句型詳解1Nothing could be better. 再?zèng)]有比這更好的了此句中形容詞(或副詞)的比較級(jí) better與否定詞 nothing連用，表達(dá)最高級(jí)的含義。常用的否定詞有 no, not, never, nothing, nobody, hardly等與比較級(jí)連用，表示最高級(jí)的含義。I think nothing is more pleasant than travelling.我想沒(méi)有什么比旅行更令人

21、愉快的了。Nobody loves money better than he.沒(méi)人比他更貪財(cái)。Did you sleep well last night? 你昨晚睡得怎樣？Never better, like a rock. 從來(lái)沒(méi)這么好過(guò)，像塊石頭。拓展：下列結(jié)構(gòu)也可表示最高級(jí)的含義：(1)否定詞soadj./adv.(原級(jí)) suchadj.(原級(jí))n.(2)adj./adv.(比較級(jí))thanany othern. (單數(shù)) any of the othern. (復(fù)數(shù))You havent done such a foolish thing!你從沒(méi)有做過(guò)這么傻的事！(這是你做過(guò)的最傻的

22、事。)Bill runs faster than any other boy any of the other boys in his class.在班里比爾跑得比別的男孩快。(1)Did you listen to Mr Jacksons lecture?Yes, I have never heard a _ one.Amore excitingBmore excitedCmost exciting Dmost excited解析：考查否定詞與比較級(jí)連用表示最高級(jí)意義，即 never.a more exciting one。答案：A (2)Who is your favourite bask

23、etball player in China?Yao Ming, of course. No one plays _.Abetter BbestCgood Dwell解析：No one plays better. 意為“沒(méi)有人(比他)打得更好”。答案：A2He could not have Yong Hui getting away with telling people lies! 他不可能讓詠慧哄騙人們后跑掉！have sb. doing 在此表示“允許或容忍(某事物)發(fā)生”。此處的 have常用在否定句中，特別是用在 will not, cannot 等之后。歸納：(1)have sb.

24、 do sth. “使某人做某事”，不定式做賓補(bǔ)省略 to，但其被動(dòng)式(sb. be made to do sth.)不能省略 to。含此種“使得”意義的其他動(dòng)詞還有 make, let, lead, drive等，如： No one can have Tom do this. 沒(méi)人能使湯姆做這件事。(2)have sth. done 包含兩層意思：一種是“請(qǐng)別人做某事”；另一種為“承擔(dān)外界或別人做某事的后果”。(3)have sb. (sth.) doing 有兩層含義：一種是“使處于某種狀態(tài)或作出某種反應(yīng)”；另一種是“允許、聽(tīng)任某種事情發(fā)生”，這種用法一般用于否定句中。(4)have st

25、h. to do 意為“有某事要做”，have 意為“有，擁有”。不定式 to do是賓語(yǔ) sth.的定語(yǔ)，句子的主語(yǔ)是不定式動(dòng)作的執(zhí)行者。如果是 to be done做定語(yǔ)時(shí)，說(shuō)明該不定式是由別人發(fā)出的。It is rude of you to speak to Father like that and I wont have you speaking to Father like that in future.那樣跟父親說(shuō)話很粗魯，今后我不會(huì)再容忍你那樣跟父親說(shuō)話。He had his audience listening attentively.他吸引住了聽(tīng)眾的注意力。No one ca

26、n have me leave the office.沒(méi)有人能使我離開(kāi)辦公室。She had her bag stolen.她的包被偷了。I have some letters to type.我有些信要打。(“我”自己動(dòng)手打)I have some letters to be typed.我有幾封信需要打。(需要找別人打)(1)We cant have people _ late all the time.Aarrive Bto arriveCarriving Darrived解析：用于否定句中 cant have sb. doing 意為“不能允許”。答案：C(2)Is this TV s

27、et _ you wish to have _？Athe one; repaired Bwhich; it repairedCthe one; it repaired Dwhich; repaired解析：第一空填 the one做先行詞，其后為省略 which的定語(yǔ)從句，且 which在從句中做 have的賓語(yǔ)，故選A。答案：A(3)Mr Smith, do you have something _ at this moment?No, thanks. Ill call you if any.Ato be typed Bto typeCtyped Dtyping解析：考查 have some

28、thing to be done結(jié)構(gòu)，因?yàn)椴欢ㄊ降闹髡Z(yǔ)不是句子主語(yǔ) you。答案：A 3Why_dont_you sit down and try a meal? 你為什么不坐下來(lái)吃頓飯呢？Why dont you.？Why not do.？為什么不？(表示建議)Why dont you have a try once again?Why not have a try once again?為什么不再試一下呢？Why dont you call him right now?Why not call him right now?為什么不立刻給他打個(gè)電話？拓展：向別人提建議也可以用：(1)had

29、better do. 最好做(2)Lets do., shall we? 讓我們做，好嗎？(3)I advise you (not) to do. 我勸你(別)做(4)I suggest that you (not) do. 我建議你(別)做(5)Cant we do.? 難道我們不可以做嗎？(6)What/How about doing.? 做怎么樣？(7)Will you please do.? 請(qǐng)你做好嗎？(8)Would you like/love to do.? 你愿意做嗎？(9)I wonder if you should do. 我想知道你是不是應(yīng)該做(10)Shall we d

30、o.? 我們做好嗎？Its a long time since I saw my sister._ her this weekend?AWhy not visit BWhy not to visitCWhy not visiting DWhy dont visit解析：Why not do.？Why dont you do.? 意為：“為什么不呢？”用于提出建議。答案：A 易 錯(cuò) 點(diǎn) 撥自我完善誤區(qū)備考1. strength/force/energy/power(1)strength 指固有的潛力。說(shuō)人時(shí)，指“力氣”；說(shuō)物時(shí)，指“強(qiáng)度”。也可指“強(qiáng)項(xiàng)，長(zhǎng)處”。(2)force 主要指自然界的力

31、量，暴力，勢(shì)力以及法律、道德或感情的力量，軍事的力量等。(3)energy 主要指人的精力或自然界的能量。(4)power 主要指做一件事所依靠的能力、功能；也可指人或機(jī)器等事物潛在的或所能發(fā)揮出來(lái)的力量；還可指職權(quán)、權(quán)力或政權(quán)。用 energy/power/force和 strength 填空。(1)Many countries are increasing their use of natural gas, wind and other forms of _.(2)The party came to _ at the last election.(3)Gandi insisted on w

32、inning independence by peaceful struggles, not by _.(4)Bill was doing a lot of physical exercise to build up his _.Energy power force strength 2. join/combine/unite/connect(1)join 側(cè)重把原來(lái)不相連接的事物緊密地連接在一起，但仍可再分開(kāi)。也指把分散的人或幾個(gè)部分的人聯(lián)合起來(lái)，或加入到某團(tuán)體中去。短語(yǔ)：join up聯(lián)合起來(lái)；join.to/and.連接。(2)combine 指兩個(gè)或兩個(gè)以上的人或物結(jié)合在一起。短語(yǔ)：

33、combine with 與結(jié)合。(3)unite 指聯(lián)合、團(tuán)結(jié)、結(jié)合在一起，構(gòu)成一個(gè)整體。(4)connect 指兩事物在某一點(diǎn)上相連接，但彼此又保持獨(dú)立。短語(yǔ)：connect.to/with 與相連；be connected with與有關(guān)系。用 join, combine, unite, connect的恰當(dāng)形式填空。(1)_， well stand; divided, well die.(2)Efforts and confidence _ to make a full man.(3)This path _ the highway up ahead.(4)This railway _

34、London and Edinburgh.United combine joins connects3. glare/glance/stare/gaze/glimpse(1)glare側(cè)重含有敵對(duì)情緒的“怒視”。(2)glance指快速地“一掃”“一瞥”。(3)stare指睜大眼睛出神地看或注視，凝視，多出于驚訝、好奇、羨慕等，有時(shí)是粗魯無(wú)禮的。(4)gaze多指由于喜愛(ài)、憧憬或快樂(lè)而長(zhǎng)時(shí)間無(wú)意識(shí)地注視。(5)glimpse無(wú)意識(shí)地一瞥，看到粗略印象，強(qiáng)調(diào)結(jié)果。(1)The policeman _ the thief as he drove past.(2)They _ at each oth

35、er for a long time, after the quarrel.(3)Its impolite to _ at foreign guests in the street.(4)He _ at her and left hurriedly.(5)The girl likes lying on her back and _ at the stars above.Glimpsed glared stare glanced gazing高 效 作 業(yè)自我測(cè)評(píng)技能備考.單詞拼寫(xiě)1If you have a good d_， you may always feel fit and health

36、y.2Sorry, this box is too heavy. I dont have the s_ to lift it.3Out of c_， I asked an impolite question, “May I know your age？”4When c_ go into a shop, they naturally look to their left but move clockwise, towards the right.digestionstrength curiosity customers5C_ the eggs with a little flour and he

37、at the mixture gently.6In some countries, people eat too much fat and sugar; they should eat a _ (均衡的) diet to keep healthy.7Taking exercise is of great _ (利益) to our health.8If I pay all my _ (債), Ill have no money left.9He is not _ (苗條的) enough to wear these tight trousers.10Who gave you _ (允許) to

38、 leave the office so early?Combine balanced benefit debts slim permission .單項(xiàng)選擇1(2010山東濰坊質(zhì)量監(jiān)測(cè))Why do you eat all the vegetables but leave _ meat untouched?Im on _ diet.Aa; the Bthe; / C/; a Dthe; a答案：D解析：考查冠詞。你為什么吃了所有的蔬菜而不動(dòng)肉呢？我在節(jié)食。第一空特指雙方都知道的“meat”，故用the；第二空on a diet“節(jié)食”，是固定搭配。2To make members of a

39、team perform better, the trainer first of all has to know their _ and weaknesses.Astrengths BbenefitsCtechniques Dvalues答案：A解析：考查名詞辨析。由題意知 weakness 的反義詞是 strength，指“強(qiáng)項(xiàng)”。3(2010福建六校三聯(lián))Even if the treatment _， theres still no magic pill for patients in the late stage of AIDS.Adoes BusesCworks Dhelps答案：

40、C解析：考查動(dòng)詞辨析。work“起作用，生效”，符合語(yǔ)意：盡管治療起作用了，對(duì)于晚期的艾滋病患者來(lái)說(shuō)還是沒(méi)有什么特效藥。4Once you have decided to buy an expensive article, you had better_an expert on it.Aask BadviseCconsult Dfind答案：C解析：句意為“一旦你決定買(mǎi)件貴重物品，你最好找這方面的專(zhuān)家咨詢一下”。consult sb. 意為“向某人請(qǐng)教”。其他選項(xiàng)不符合語(yǔ)境。5A large sum of money has been raised for the _of the poorly

41、educated children in the mountainous districts.Aprofit BfavorCadvantage Dbenefit答案：D解析：for the benefit of.“為了的利益/好處”，是固定搭配。6Youd better _ your expenses on clothes.Acut up Bcut downCcut off Dcut out答案：B解析：表示“削減花費(fèi)/開(kāi)銷(xiāo)”，用 cut down。7A harmonious society is like a symphony orchestraeach person contributes

42、 a small sound, but when _ with other sounds, it becomes beautiful music.Acombining Bbeing combinedCcombined Dto be combined答案：C解析：考查非謂語(yǔ)動(dòng)詞。當(dāng)狀語(yǔ)從句的主語(yǔ)與主句中的主語(yǔ)一致且謂語(yǔ)中含有be動(dòng)詞時(shí)，可以省略狀語(yǔ)從句中的主語(yǔ)和be動(dòng)詞，本句完整形式應(yīng)為when it is combined.。8The child should be punished. You shouldnt let him _ telling lies.Akeep away from Bk

43、eep away withCget away from Dget away with答案：D解析：考查動(dòng)詞短語(yǔ)。句意為：這個(gè)孩子應(yīng)該受到懲罰。你不應(yīng)該讓他逃脫撒謊受到的處罰。get away with表示“僥幸成功，逃脫處罰”；get away from表示“逃離”；keep away from表示“遠(yuǎn)離”。9You should understand the traffic rule by now. Youve had it _ often enough.Aexplaining Bto explainCexplain Dexplained答案：D解析：本題中it指代the traffic r

44、ule，它與explain構(gòu)成動(dòng)賓關(guān)系，因此用過(guò)去分詞做賓補(bǔ)。have sth. done讓別人做某事。10What an unforgettable experience! Ill write it down _ it is still fresh in my memory.Asince BwhileCafter Duntil答案：B解析：句意：多么令人難忘的經(jīng)歷！趁記憶猶新，我要把它寫(xiě)下來(lái)。while引導(dǎo)時(shí)間狀語(yǔ)從句。11There was an oil painting _ in the corner. It _ there for several days.Alaying; had l

45、aid Blain; had laidClying; had lain Dlaid; had been lain答案：C解析：第一空填 lying表示“正處于某狀態(tài)”；第二空填 had lain表示“已經(jīng)處于該位置好幾天了”。12If you just spend time _ advantages and disadvantages, you may get nothing in the end.Amatching BbalancingCobserving Dexamining答案：B解析：balance advantages and disadvantages 意為“權(quán)衡利弊”。13The

46、 weather isnt good enough for an outing, isnt it?Not in the least. We cant have _ at this time of the year.Aa worse day Ba nicer dayCsuch bad a day Dso fine a day答案：A解析：not in the least 相當(dāng)于 not at all, 意為“根本不”。此題考查比較級(jí)的否定形式表達(dá)最高級(jí)的含義。B、D兩項(xiàng)與題意不符；C項(xiàng)結(jié)構(gòu)錯(cuò)誤。14Lucy doesnt mind lending you her dictionary.She _

47、. Ive already borrowed one.Acant BmustntCneednt Dshouldnt答案：C解析：句意為：“Lucy不介意把詞典借給你。”“她不必了。我已經(jīng)借了一本了?！北绢}測(cè)試情態(tài)動(dòng)詞的用法。 neednt 不必(不需要)；cant 不能(不許)；mustnt 不行(禁止)；shouldnt 不該(責(zé)備)。15Why dont we hold a party to celebrate the achievements gained by our Olympic players?_ABecause we havent got enough preparations

48、.BGood idea!CIts all because of the terrible weather.DNot all would like to attend it.答案：B解析：Why dont.？“為什么不？”用于提出建議，故回答B(yǎng)項(xiàng)“好主意”。 .閱讀理解AMany people think the search for cleaner energy leads only to renewable resources like sun, wind and water. But it also leads to a fossil fuel. Natural gas is consid

49、ered the cleanest of the fossil fuels, the fuel created by plant and animal remains over millions of years. Burning it releases fewer pollutants than oil or coal. The gas is mainly methane (甲烷). It produces half the carbon dioxide of other fossil fuels. So it may help cut the production of carbon ga

50、ses linked to climate change. Russia is first in what are called “proved reserves” of natural gas. The United States is sixth. Over the years, big oil and gas companies recovered much of the easily reached supplies of gas in America. They drilled straight down into formations where gas collects. As

51、these supplies were used up, big drillers looked for similar formations in other countries.But now the industry is taking a new look. Companies are developing gas supplies trapped in shale (頁(yè)巖) rock two to three thousand meters underground. They drill down to the shale, then go sideways and inject highpressure water, sand o