2019高考英語一輪基礎(chǔ)梳理與練習(xí) Unit 2 The United Kingdom（含解析）新人教版必修5

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1、 Unit 2　The United Kingdom 李仕才 【短文語法填空】 On the first day of her work, Sally found that a class full of problems was waiting for her. She was told six teachers 1. (quit) before her. When she walked into the classroom, it was chaos: two boys were fighting in a corner, yet 2. rest of the

2、class seemed not to notice them; some girls were chatting and some were running about with paper, food packages and other garbage 3. (leave) everywhere. Sally walked onto the platform, 4. (pick) up a piece of chalk and wrote on the blackboard: “Rule 1: We are family！”All students stopped

3、5. (look) at her. And she continued with Rule 2, Rule 3 ... In the following weeks, Sally worked out 10 class rules and posted them 6. the wall of the classroom. She patiently explained all the rules to the students and required everyone to follow them. 7． (surprise), Sally was not d

4、riven out like the former teachers; 8. ， she won respect from the students. Over the years, she has witnessed gradual changes in the class. At the graduation ceremony, just 9. she expected, she was very proud to stand with a class of care，manners and 10. (confident)． 【解題導(dǎo)語】　本文講述了一名老師

5、通過努力制定課堂規(guī)則，最終感化學(xué)生的故事。 1．had quit(ted)　解析：考查動(dòng)詞的時(shí)態(tài)。句意：她被告知在她之前已有六位老師辭職。根據(jù)語境，quit 的動(dòng)作發(fā)生在 was told 之前，即“過去的過去”，應(yīng)用過去完成時(shí)。故填 had quit(ted)。 2．the　解析：考查冠詞。句意：當(dāng)她走進(jìn)教室的時(shí)候，教室里一片混亂：兩個(gè)男孩在角落里打架，而班里剩下的人好像根本沒注意到他們；一些女孩在聊天，一些人在到處跑，到處都是紙、食品袋和其他垃圾。the rest of 為固定短語，意為“其余的”。故填 the。 3．left　解析：考查非謂語動(dòng)詞。句意見上一題解析。此處為“with

6、＋賓語＋賓補(bǔ)”的復(fù)合結(jié)構(gòu)，邏輯主語為 paper, food packages and other garbage，與動(dòng)詞 leave 之間是被動(dòng)關(guān)系，故用過去分詞作賓補(bǔ)。故填 left。 4．picked　解析：考查動(dòng)詞的時(shí)態(tài)。句意：薩莉走上講臺(tái)，拿起一支粉筆在黑板上寫下：“規(guī)則1：我們是一家人！”。分析句子結(jié)構(gòu)可知，設(shè)空處與 walked 和 wrote 為并列的謂語動(dòng)詞，因此，應(yīng)用一般過去時(shí)，故填 picked。 5．to look　解析：考查非謂語動(dòng)詞。句意：所有學(xué)生都停下來看著她。此處指學(xué)生停下正在做的事情來看她，stop to do sth. 意為“停下來去做某事”。故填to

7、look。 6．on/onto　解析：考查介詞。句意：接下來的幾周，薩莉制定了10條班級(jí)規(guī)則，并把它們張貼在教室的墻上。post...on/onto...意為“把……張貼在……上”，故填 on 或 onto。 7．Surprisingly　解析：考查詞性轉(zhuǎn)換。句意：令人驚訝的是，薩莉并沒有像之前的老師那樣被趕走，反而贏得了學(xué)生們的尊重。設(shè)空處在句中作狀語，修飾整個(gè)句子，應(yīng)用副詞。故填 Surprisingly。 8．instead　解析：考查副詞。句意見上一題解析。根據(jù)句意可知，上下文是對(duì)比關(guān)系，設(shè)空處表示“而不是；相反”。故填instead。 9．a(chǎn)s　解析：考查定語從句。句意：在畢

8、業(yè)典禮上，正如她所期待的那樣，她非常自豪地與一個(gè)細(xì)心、禮貌并且自信的班級(jí)站在一起。本句是一個(gè)非限制性定語從句，修飾整個(gè)句子，且位于句首，根據(jù)句意可知，設(shè)空處表示“正如”。故填 as。 10．confidence　解析：考查詞性轉(zhuǎn)換。句意見上一題解析。設(shè)空處作介詞 of 的賓語，應(yīng)用名詞，故填 confidence。 (對(duì)應(yīng)學(xué)生用書P113) 一．高考單詞→識(shí)記·思考·運(yùn)用 1．核心詞匯 ①__clarify__ vt.澄清；闡明 ②__accomplish__ vt.完成；達(dá)到；實(shí)現(xiàn) ③__conflict__ n．矛盾；沖突 ④__thrill__ vt.使激動(dòng)；使膽

9、戰(zhàn)心驚 ⑤fold vt.折疊；對(duì)折__unfold__ vt.打開；拆開 ⑥consist vi.組成，一致__consistent__ adj.一致的 ⑦unite vi.& vt.聯(lián)合；團(tuán)結(jié)__united__ adj.團(tuán)結(jié)的；聯(lián)合的__union__ n．聯(lián)合；聯(lián)盟；結(jié)合；協(xié)會(huì) ⑧convenience n．便利；方便__convenient__ adj.方便的 ⑨rough adj.粗糙的；粗暴的__roughly__ adv.粗略地；粗糙地 ⑩attract vt.吸引；引起注意__attraction__ n．吸引；吸引力__attractive__ adj.有吸引力

10、的 ?delight n．快樂；喜悅 vt.使高興；使欣喜__delighted__ adj.高興的；快樂的 2．?？荚~匯 ①description n．__描寫；描述__ describe vt.__描述；形容；描繪__ ②possibility n．__可能(性)__ possible adj.__可能的；合理的__ ③arrange vt.__籌備；安排；整理__ arrangement n．__布置；整理__ ④splendid adj.__壯麗的；輝煌的__ 用所給單詞的適當(dāng)形式填空 1．To begin with, we’ll have our class i

11、n my home next Sunday if it is __convenient__ (convenience) to you.(2017·全國卷Ⅰ) 2．These pieces can __be folded__ (fold) into a neat little pack and fastened on your belt.(2017·全國卷Ⅰ) 3．Some people worry that the new language requirement may cause __conflicts__ (conflict) among people.(2017·浙江卷) 4

12、．The __possibility__ (possible) of entering into and losing such a match should concentrate the minds of computer scientists.(2017·北京卷) 5．The author uses a conversation at the beginning of the passage __to clarify__ (clarify)his writing purpose.(2016·浙江卷) 6．My mother and father __were united__ (un

13、ite)in their way of raising children，but it mostly fell to my mother to actually carry it out.(2016·浙江卷) 7．This will give you the confidence you need to get you through the afternoon and go home feeling __accomplished__ (accomplish)．(2016·全國卷Ⅱ) 8．Some people think that the great Chinese scholar Co

14、nfucius，who lived from __roughly__ (rough)551 to 479B.C.，influenced the development of chopsticks.(2016·全國卷Ⅲ) 【聯(lián)想·積累】 ?“高興”家族速覽 ①delight n．快樂，高興 vt.使高興，使欣喜；delighted adj.喜歡的，高興的；delightful adj.令人高興的 ②happy adj.愉快的，高興的； happiness n．快樂，幸福 ③joy n．歡樂，高興；joyful adj.快樂的，高興的 ④glad adj.高興的，歡喜的 ⑤plea

15、se v．(使……)高興； pleased adj，高興的，滿意的； pleasure n．高興，滿意 ⑥merry adj.歡樂的，愉快的； merrily adv.快樂地 ?后綴ence必備名詞集錦 ①consequence 后果，結(jié)果 ②convenience 方便 ③dependence 依靠 ④difference 不同 ⑤emergence 緊急情況 ⑥existence 存在 ⑦intelligence 聰明 ⑧influence 影響 ?以“ity”為后綴的名詞速記 ①possibility n．可能性 ②ability n．能力 ③pop

16、ularity n．受歡迎；普及；流行 ④personality n．性格；個(gè)性；人格 ⑤nationality n．國籍；民族；族 ⑥minority n．少數(shù)民族；少數(shù)；少數(shù)派；少數(shù)人 ?前綴a高頻表語形容詞大全 ①alike　 相同的；類似的 ②asleep 睡著的 ③alive 活的；有活力的 ④awake 醒著的 ⑤afraid 害怕的 ⑥ashamed 羞愧的 【完形填空】 The murmur of the audience had just faded into silence.This was one of the most __1__

17、 days in five-year-old Patricia McKee's life：the Kernot School Concert.She stood __2__ the curtain with her schoolmates.Yet she was not __3__ because everyone had been practicing for weeks and knew their __4__ by heart. Being in a remote country town，Patricia knew that everyone would __5__ for the

18、big occasion－everyone！Yet，it was this awareness that added a sense of __6__ to her excitement.There were two people who couldn't be in that __7__ that night—her mum and dad. Patricia's parents __8__ the local general store，which was __9__ for business 24 hours.So it was simply __10__ that Mum and D

19、ad could never attend community activities.It had been this way with her sister，so why should it be any __11__ for her? Still，Patricia couldn't help __12__ that her parents could be there to see her on such a special day，so she decided to __13__ the subject with her mother.__14__，she had to face th

20、e facts.At such a young age，Patricia couldn't really understand the deep __15__ in her mother's response：“I'll try to be there，sweetheart，but you know how __16__ it is for us to get away from the store.” Yet as the curtain slowly opened, little Patricia got the __17__ of her life.There，sitting four

21、 rows the front was her mother with a big smile on her face! This powerful image __18__ one of Patricia's most treasured memories.“Words cannot express the pure joy we both __19__ at that moment，” said Patricia.Her parents have passed away, but what a wonderful legacy(遺產(chǎn)) they've left us：when someo

22、ne really __20__ you，be there for them. 1．A.difficult　　　　　　B．important C．sad D．perfect 2．A.before B．under C．beside D．behind 3．A.excited B．moved C．a(chǎn)fraid D．lost 4．A.parts B．relations C．jobs D．forms 5．A.join up

23、 B．prepare C．drop in D．turn out 6．A.happiness B．sadness C．willingness D．eagerness 7．A.audience B．store C．play D．movie 8．A.bought B．got C．sold D．ran 9．A.easy B．open C．still D．closed 10．A.recogniz

24、ed B．denied C．a(chǎn)ccepted D．incredible 11．A.different B．satisfied C．personal D．wise 12．A.thinking B．talking C．learning D．wishing 13．A.hand in B．go through C．bring up D．put away 14．A.Surprisingly B．Happily C．Obviously D．Sadly 15．A.pai

25、n B．meaning C．understanding D．thought 16．A.awful B．hard C．troublesome D．thankful 17．A.blow B．wonder C．person D．surprise 18．A.remained B．left C．took D．a(chǎn)ffected 19．A.wanted B．experienced C．made D．forgot 20．A.hates B．lo

26、ves C．cares D．needs 【解題導(dǎo)語】本文是一篇夾敘夾議文。父母因忙于看店無法去看Patricia McKee的演出，所以當(dāng)Patricia突然看到母親出現(xiàn)在演出現(xiàn)場(chǎng)時(shí)，她非常驚訝。這一刻成了她一生的回憶。文章通過這件事告訴我們：當(dāng)別人需要你時(shí)，請(qǐng)陪在他們身邊。 1．B　考查形容詞辨析。根據(jù)第二段中的“the big occasion”以及常識(shí)可知，對(duì)于五歲的Patricia來說，那天是一個(gè)重要的日子。B項(xiàng)意為“重要的”，符合語境。A項(xiàng)意為“困難的”；C項(xiàng)意為“悲傷的”；D項(xiàng)意為“完美的”，均與語境不符。故選B。 2．D　考查介詞辨析。根據(jù)常識(shí)及第五段第一句

27、“Yet as the curtain slowly opened”可知，出場(chǎng)前Patricia和她的同學(xué)站在幕布的后面。D項(xiàng)意為“在……的后面”，符合語境。A項(xiàng)意為“在……面前”；B項(xiàng)意為“在……下面”；C項(xiàng)意為“在……旁邊”，均與語境不符。故選D。 3．C　考查形容詞辨析。根據(jù)空格后的“because everyone had been practicing for weeks”可知，所有人都排練了幾個(gè)星期，所以她不害怕。C項(xiàng)意為“害怕的”，符合語境。A項(xiàng)意為“興奮的”；B項(xiàng)意為“感動(dòng)的”；D項(xiàng)意為“迷惘的，困惑的”，均與語境不符。故選C。 4．A　考查名詞辨析。根據(jù)本句中的“ever

28、yone had been practicing for weeks”可知，排練了幾個(gè)星期，每個(gè)人都記熟了自己的臺(tái)詞和動(dòng)作。A項(xiàng)意為“角色，臺(tái)詞和動(dòng)作”，符合語境。B項(xiàng)意為“關(guān)系”；C項(xiàng)意為“工作”；D項(xiàng)意為“形式”，均與語境不符。故選A。 5．D　考查動(dòng)詞(短語)辨析。根據(jù)語境可知，所有人都會(huì)出席這個(gè)盛大的活動(dòng)。D項(xiàng)意為“出席，參加”，符合語境。A項(xiàng)意為“連接，聯(lián)合起來”；B項(xiàng)意為“準(zhǔn)備”；C項(xiàng)意為“落進(jìn)，順便拜訪”，均與語境不符。故選D。 6．B　考查名詞辨析。根據(jù)下一句內(nèi)容可知，因?yàn)楦改覆荒軄碛^看演出，所以Patricia在興奮的同時(shí)又有些難過。B項(xiàng)意為“悲傷，難過”，符合語境。A項(xiàng)

29、意為“幸?！保籆項(xiàng)意為“樂意”；D項(xiàng)意為“渴望”，均與語境不符。故選B。 7．A　考查名詞辨析。根據(jù)下一段內(nèi)容可知，此處指Patricia的父母親不能在現(xiàn)場(chǎng)當(dāng)她的觀眾。A項(xiàng)意為“觀眾，聽眾”，符合語境。故選A。 8．D　考查動(dòng)詞辨析。根據(jù)空格后面的賓語“the local general store”可知，此處指Patricia的父母在當(dāng)?shù)亟?jīng)營一家雜貨店。D項(xiàng)意為“經(jīng)營，參加，跑”，符合語境。故選D。 9．B　考查形容詞辨析。根據(jù)空格后面的“for business 24 hours”可知，這個(gè)雜貨店24小時(shí)營業(yè)。B項(xiàng)意為“開放的，營業(yè)的”，符合語境。故選B。 10．C　考查詞義辨析。

30、根據(jù)上下文可知，她的父母經(jīng)營一家24小時(shí)都營業(yè)的商店，所以她的父母從不參加社區(qū)活動(dòng)是可以接受的。C項(xiàng)意為“公認(rèn)可接受的，被認(rèn)可的”，符合語境。A項(xiàng)意為“辨認(rèn)出”；B項(xiàng)意為“否認(rèn)”；D項(xiàng)意為“極好的，難以置信的”，均與語境不符。故選C。 11．A　考查形容詞辨析。根據(jù)前一句“It had been this way with her sister”可知，父母也沒有參加過姐姐的活動(dòng)，所以對(duì)她不會(huì)有所不同。A項(xiàng)意為“不同的”，符合語境。B項(xiàng)意為“滿意的”；C項(xiàng)意為“個(gè)人的”；D項(xiàng)意為“明智的”，均與語境不符。故選A。 12．D　考查動(dòng)詞辨析。根據(jù)本句中的“Still”和“her parents

31、could be there”可知，雖然如此，Patricia還是忍不住希望她的父母親能來看她演出。D項(xiàng)意為“希望”，符合語境。A項(xiàng)意為“想，認(rèn)為”；B項(xiàng)意為“談?wù)摗?；C項(xiàng)意為“學(xué)習(xí)”，均與語境不符。故選D。 13．C　考查動(dòng)詞短語辨析。根據(jù)上文提到的Patricia希望她的父母能來看她演出和空格后面的賓語“the subject with her mother”可知，此處指Patricia決定向母親提出這個(gè)話題。C項(xiàng)意為“提出”，符合語境。A項(xiàng)意為“上交”；B項(xiàng)意為“經(jīng)歷”；D項(xiàng)意為“把……收起來”，均與語境不符。故選C。 14．D　考查副詞辨析。根據(jù)本句中的“she had to fa

32、ce the facts”以及下文母親的回答可知，她的母親并不確定能不能參加，所以很遺憾她只能接受這個(gè)事實(shí)。D項(xiàng)意為“不幸地，說來遺憾”，符合語境。A項(xiàng)意為“驚訝地”；B項(xiàng)意為“高興地”；C項(xiàng)意為“明顯地”，均與語境不符。故選D。 15．A　考查名詞辨析。根據(jù)常識(shí)以及后來母親出現(xiàn)在觀眾席里可知，母親想?yún)⒓优畠旱幕顒?dòng)卻抽不出時(shí)間，她也很痛苦，但五歲的Patricia并不理解這種痛苦。A項(xiàng)意為“痛苦”，符合語境。B項(xiàng)意為“意思”；C項(xiàng)意為“理解”；D項(xiàng)意為“想法”，均與語境不符。故選A。 16．B　考查形容詞辨析。根據(jù)上文提及的24小時(shí)營業(yè)商店可知，她的父母親離開商店是一件很困難的事情。B項(xiàng)意

33、為“困難的”，符合語境。A項(xiàng)意為“可怕的”；C項(xiàng)意為“麻煩的”；D項(xiàng)意為“感激的”，均與語境不符。故選B。 17．D　考查名詞辨析。根據(jù)上文母親的回答可知，母親觀看Patricia的演出的可能性不大，所以當(dāng)Patricia看到臺(tái)下的母親時(shí)，那真的是她人生中的驚喜。D項(xiàng)意為“驚喜，意想不到的事”，符合語境。A項(xiàng)意為“打擊”；B項(xiàng)意為“奇跡”；C項(xiàng)意為“人”，均與語境不符。故選D。 18．A　考查動(dòng)詞辨析。根據(jù)上文可知，母親的出現(xiàn)對(duì)Patricia來說是一個(gè)很大的驚喜，所以這一幕成為Patricia最珍貴的記憶之一。A項(xiàng)意為“繼續(xù)，依然”，符合語境。B項(xiàng)意為“離開”；C項(xiàng)意為“拿走”；D項(xiàng)意為

34、“影響”，均與語境不符。故選A。 19．B　考查動(dòng)詞辨析?！皐e both ________ at that moment”是省略了關(guān)系代詞that或which的定語從句，先行詞the pure joy在從句中作空格處所填詞的賓語。句意為Patricia說：“沒有言語能表達(dá)出我們?cè)谀且豢趟w會(huì)到的那種純粹的快樂?！盉項(xiàng)意為“體會(huì)，感受”，符合語境。A項(xiàng)意為“想要”；C項(xiàng)意為“使得，制造”；D項(xiàng)意為“忘記”，均與語境不符。故選B。 20．D　考查動(dòng)詞辨析。通讀全文可知，文章通過 Patricia的經(jīng)歷告訴我們：當(dāng)別人真正需要你時(shí)，要陪伴在他們的身邊。D項(xiàng)意為“需要”，符合語境。A項(xiàng)意為“憎恨

35、”；B項(xiàng)意為“愛”；C項(xiàng)意為“在乎”，均與語境不符。故選D。 二．重點(diǎn)短語→識(shí)記·思考·運(yùn)用 1．動(dòng)詞＋介詞/副詞 ①divide...__into__把……分成 ②break __away(from)__ 掙脫(束縛)；脫離 ③leave __out__省去；遺漏；不考慮 ④break __down__ (機(jī)器)損壞；破壞 ⑤consist __of__ 由……組成 2．to one’s＋名詞 ①__to__ one’s credit為……帶來榮譽(yù)；值得贊揚(yáng)；在……名下 ②__to__ one’s delight/joy 使某人高興的是 ③__to__ one’s

36、surprise 使某人驚奇的是 3．in＋名詞＋(of) ①__in__ memory of 為了紀(jì)念 ②in favour __of__ 支持…… ③in need __of__ 需要…… ④__in__ support of 支持… 4．其他形式 take the place __of__ 代替 用左欄所給短語的適當(dāng)形式填空 1．When the container is full, you can suck the refreshment out through the tube, and won’t have to __break down__ the still

37、every time you need a drink.(2017·全國卷Ⅰ) 2．Hannah’s Place __is divided into__ several areas，providing shelter for people when it is so cold that sleeping outdoors can mean death.(2017·北京卷) 3．More recently, the foundation began another campaign called National Red Scarf Day－a day when people donate

38、 $20 and wear red scarves __in support of__ Canada’s hungry and homeless.(2017·北京卷) 4．Listening is thus an active，not a passive，behavior __consisting of__ hearing，understanding and remembering.(2015·浙江卷) 5．This word is wrongly spelt.You have __left out__ a letter. 6．Computers have __taken the pla

39、ce of__ human beings in many fields so far. 7．The TV __broke down__ again，which made me very unhappy. 8．Taiwan is never allowed to __break away from__ the mainland anyway.It is known to all that it belongs to China. ?“動(dòng)詞＋away”必備短語一覽 ①blow away 吹走 ②break away 擺脫 ③carry away 拿走，使入迷 ④die away

40、逐漸消失，減弱 ⑤give away 背棄，贈(zèng)送 ⑥put away 收起來，存起來 ⑦wash away 沖走 ⑧take away 拿走 ⑨t(yī)hrow away 扔掉 ⑩turn away 把……打發(fā)走 ?“to one’s＋n”必備短語薈萃 ①to one’s astonishment/surprise 令某人驚奇的是 ②to one’s disappointment 令某人失望的是 ③to one’s regret 使某人感到遺憾的是 ④to one’s shame 使某人慚愧的是 ?“v.＋from”短語薈萃 ①suffer from 遭受 ②adapt

41、from 從……改編 ⑧benefit from 從……中獲益 ④date from 始于…… ⑤result from 因……而起 ⑥escape from 從……逃脫 ⑦die from 死于 ⑧hear from 收到某人的來信 ?leave相關(guān)短語全接觸 ①leave out 省去；遺漏；不考慮 ②leave...alone 不管；不顧；撇下……一個(gè)人 ③leave behind 留下；遺忘 ④leave for 動(dòng)身前往(某處) 三．佳句選粹——在解讀中學(xué)懂，在仿寫中學(xué)通 背原句 學(xué)句型 練仿寫 1.You must keep your eyes op

42、en if you are going to make your trip to the United Kingdom enjoyable and worthwhile. 要使你的英國之行愉快且值得，你就必須留心觀察。 “keep/make＋賓語＋賓補(bǔ)”結(jié)構(gòu)。 為了讓魚兒在河里自由自在快快樂樂地游來游去，我們必須讓河水保持干凈。 We must __keep the river clean__ in order to __make the fish in it swim freely and happily__. 2.Worried about the time available，

43、Zhang Pingyu had made a list of the sites she wanted to see in London. 由于擔(dān)心時(shí)間不夠，張萍玉早就把她想要在倫敦參觀的地點(diǎn)列了清單。 過去分詞短語作狀語。 在森林中迷了路，我們不得不待在原地等待幫助。 __Lost in the forest__，we had to remain where we were，waiting for help. 3.It looked splendid when first built! 剛建成的時(shí)候，它看起來真是金碧輝煌！ 狀語從句的省略。 剛被引入市場(chǎng)時(shí)，這些產(chǎn)品就取得了

44、巨大的成功。 __When first introduced to the market__，these products enjoyed great success. 4.It seemed strange that the man who had developed communism should have lived and died in London. 這似乎是一件怪事：這位發(fā)展了共產(chǎn)主義的人竟然在倫敦生活過，并且在倫敦去世。 It seemed strange that...“……似乎有點(diǎn)兒奇怪”，should have done表示對(duì)過去發(fā)生的事情感到驚訝。 看起來很

45、奇怪，他竟然拒絕了我們提出的行之有效的建議。 It seemed strange that he __should have rejected__ the practical suggestion put forward by us. 【七選五】 As warming continues，scientists warn the oxygen content of oceans across the planet could be more and more reduced，with serious consequences for the future of fish and oth

46、er sea life. 1 One is the simple fact that as water gets warmer，it can hold less dissolved(溶解的)oxygen.The other reason is less obvious.The entire ocean gets its oxygen from the surface—either from the atmosphere，or from photosynthesizing algae floating at the top of the sea. 2 Global warmin

47、g is expected to reduce the mixing of the ocean by making surface seawater lighter.That's because in a warmer world we can expect more rainfall and more melting(融化)of glaciers，icebergs，and ice sheets. 3 The extra heat from the warming atmosphere will also make surface water expand and thus make i

48、t lighter still. 4 Instead，more of the oxygen will remain near the surface，where it will be used up by oxygen-breathing organisms. A low-oxygen ocean may become an inescapable feature of our planet.A team of Danish researchers wondered how long oxygen levels would drop if we could somehow reduce

49、 our carbon dioxide emissions to zero by 2100.They determined that over the next few thousand years oxygen levels would continue to fall，until they declined by 30 percent.The oxygen would slowly return to the oceans，but even 100，000 years from now they will not have fully recovered. 5 　 A．It's no

50、t known why the oxygen level of oceans has reduced. B．Scientists point to two reasons to expect a drop in ocean oxygen. C．Fresh water's inpouring will make the water at the ocean's surface lighter. D．The oxygen then spreads to the deep ocean as the surface water slowly sinks. E．Global warming ha

51、s caused the reduction of the oxygen content of oceans worldwide. F．The light surface water will be less likely to sink so the deep ocean will get less oxygen. G．If they are right，we have every reason to worry about the major effect it has on sea life. 【語篇解讀】　本文是說明文。文章簡要介紹了海水中氧氣含量主要原因及其可能對(duì)海洋生物帶來的

52、長期的影響。 1．B　[從文章篇章結(jié)構(gòu)分析，本空為段落主旨句。本段介紹了全球變暖使海洋含氧量降低的原因，并且“One”“The other reason”與B項(xiàng)中的“two reasons”相呼應(yīng)，故選B。] 2．D　[根據(jù)段落主旨和空前的“The entire ocean gets its oxygen from the surface...at the top of the sea.”可知，此處是通過說明海洋中氧氣的來源與循環(huán)來解釋海洋含氧量下降的原因的，故D項(xiàng)“然后，隨著表層海水的慢慢下沉，氧氣擴(kuò)散至海洋深處”符合語境。] 3．C　[根據(jù)空前的內(nèi)容和常識(shí)可知，雨水和冰川、冰山及冰原

53、融水都屬于淡水，海洋中的水是咸水，而淡水的密度比咸水的小，因此淡水的注入會(huì)使海洋表面的水變得更輕。故C項(xiàng)符合語境。C項(xiàng)中的“make the water...lighter”與下文中的“make it lighter”的對(duì)應(yīng)關(guān)系亦是提示。] 4．F　[根據(jù)空前的“The extra heat from the warming atmosphere will ...”和空后的“Instead，more of the oxygen will remain...”可知，F(xiàn)項(xiàng)與空前的句子的句式相同，且與空后的句子的內(nèi)容存在語意上的轉(zhuǎn)折關(guān)系，故F項(xiàng)符合語境。] 5．G　[G項(xiàng)中的“they”與上文中的“A team of Danish researchers”相呼應(yīng)，且上文講到即使我們把二氧化碳的排放降低到零，海洋含氧量也需要很長時(shí)間才能恢復(fù)，其對(duì)海洋生物造成的影響將是長期的，故G項(xiàng)“如果他們是對(duì)的，那么我們完全有理由對(duì)它對(duì)海洋生物的重大影響感到擔(dān)憂”符合語境。 ] 13