1、2012届高考英语三轮复习回扣课本精讲精练复习学案-人教版必修3- Unit 4Astronomy the science of the stars.重点单词聚焦1It cost him more than one_(十亿) dollars to complete the project.答案：billion2“What happened？” Johns mother asked him in a_(温和的) voice.答案：gentle3Before the Earths protective_(大气层) was formed，there was no life except in the
2、 sea.答案：atmosphere4With the_(引力) of the moon and the sun each day，tides (潮汐) roll in and roll away.答案：pull5Manmade_(卫星) are used for sending and receiving messages.答案：satellites6Smoking_(乘，增加) the risk of heart attacks and other health problems.答案：multiplies7Eating too many desserts can be_(有害的) to
3、ones teeth.答案：harmful8Global warming and_(气候) change problems are perhaps the greatest threats to our planet.答案：climate9According to the_(理论) of relativity (相对论)，nothing can travel faster than light.答案：theory10Most of the evidence had been destroyed._(因此，于是)，it was almost impossible to prove him gui
4、lty.答案：Thus课文原句突破1随后它会变成什么没有人知道，直到3845亿年前，这团尘埃才慢慢地形成一个固体的球状物。_ _ _ _ _was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.答案：What it was to become 2地球变得如此猛烈，以至于它的形状能否持久还不清楚。The earth became_violent_it was not clear whether the shape would last or not.答案
5、：so；that3这就产生了一系列的反应，使得生命就有可能开始发展了。This produced a chain reaction，which_ _ _ _ _ _ _.答案：made it possible for life to develop4而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。But when I tried to step forward，I found I was carried_ _ _ _ on the earth and fell over.答案： twice as far as5“天哪，”我大声说。“引力改变了，走路也
6、的确需要练一练了。”“Oh，dear，” I cried，“walking does need a bit of practice_ _gravity has changed.”答案：now thatatmosphere n大气层，空气；环境，气氛教材原句P25：They were in time to produce carbon，nitrogen，water vapour and other gases，which were to make the earths atmosphere.它们最终产生了碳、氮气、水蒸气和其他气体，这些后来形成了地球的大气层。The waste they cre
7、ate goes into the atmosphere and makes us sick.它们制造出来的废气进入大气中，导致我们生病。The simple atmosphere of the office calmed me.简朴的办公室气氛让我平静下来。Ever since their quarrel，there has been an unpleasant atmosphere in the office.自从他们发生口角以来，办公室里总有一种不愉快的气氛。1.(湖北高考)The top leaders of the two countries are holding talks in
8、 a friendly_.AatmosphereBstateCsituationDphenomenon解析：句意为：两国高层领导人之间的会谈在友好的气氛中举行。atmosphere气氛；state状态；situation处境；phenomenon现象。由句意可知A项正确。答案：Aharmful adj.有害的，其反义词为harmless教材原句P26：What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids
9、into the oceans and seas.很多科学家相信，由于地球上长期有水存在，它使得地球得以把曾经存在于大气层中的有害气体和酸性物质溶解在海洋里。be harmful to对有害do harm to./do.harm损害There is no harm in doing sth./It does no harm to do sth.做某事是个好主意(或没有坏处)It is harmful to your health to drink too much.过量喝酒对你的身体有害。Your smoking can be harmful to the health of your chi
10、ldren.你吸烟会危及孩子的健康。He would never frighten anyone or cause them any harm.他永远不会吓唬或伤害任何人。He may say no，but theres no harm in asking.他可能拒绝，但问一问也无妨。2.Doctors always tell us that drinking too much_our health，but some people dont care.Ais harm toBdoes harmful toCis harmful toDdo harm to解析：句意为：医生总是告诉我们饮酒太多有
11、害健康，但有些人却不在意。be harmful to sb.do harm to sb.对某人有害。D项应用第三人称单数。答案：Cpuzzle vt.使迷惑；使为难；使窘困；感到迷惑；n.(游戏的)猜谜；难题；谜教材原句P27：How life began on earth is one of the biggest puzzles that scientists found hard to solve.地球生命如何起源是科学家们觉得很难解决的最大的难题之一。What puzzles me is why he left the country without telling anyone.令我
12、百思不解的是他为什么悄悄地离开了这个国家。I have been puzzling about this question for weeks now.我对这个问题已冥思苦想了好几个星期。Its quite a puzzle to us why he did that.他为何做这样的事，我们完全搞不懂。Her puzzled look on her face suggested she didnt understand what I said.她脸上迷惑的表情表明她不明白我说的话。3.完成句子She lost heart since she failed in the exam.She_(对将
13、来感到迷茫)答案：felt puzzled about her futurepull n& vt.拉(力)；拖；牵引力教材原句P30：As the rocket rose into the air，we were pushed back into our seats because we were trying to escape the pull of the earths gravity.随着火箭的升空，我们被重重地推回到座位上，因为我们正尽力摆脱地球的引力。pull back撤回pull down拆毁；摧毁pull in(车辆)进站停靠；靠边停靠pull out驶出；退出pull thr
14、ough康复；痊愈He pulled the door open and rushed out.他拉开门，冲了出去。The police car signalled to us to pull in.警车发出信号，要我们驶向路边停靠。We waved as the train pulled out of the station.火车驶出车站时我们挥手告别。The doctor told me that I would pull through.医生告诉我我会康复的。4.用pull的短语填空：(1)Houses were_to make way for a new highway.(2)Chee
15、r up！Take more exercise every day and you will_.(3)John_behind me and parked.(4)Be careful when you_of the driveway.答案：(1)pulled down(2)pull through(3)pulled in(4)pull outin time及时；终于；总有一天He managed to send the tourists to the airport in time.他设法把游客及时送到机场。Will you be home in time to see the children
16、 before they go to bed？你会在孩子们上床睡觉之前回来看他们吗？If you keep on，you will succeed in time.如果坚持下去，你们迟早会成功的。on time准时；按时in no time立即；马上at a time一次；每次at one time曾经；一度at the same time同时take ones time别着急；慢慢来At one time，half the land on the Earths surface was covered by forest.曾经，地球表面有一半的土地被森林所覆盖。You must give yo
17、ur homework to the teacher on time.你必须准时把作业交给老师。5.用time的适当短语填空：(1)The cloud never hides the sun.The truth will be known to all_.(2)_there were not so many cars on the streets.(3)_I go out to the beach to relax.(4)I am afraid I cant return the book to you before Friday._.答案：(1)in time(2)At one time(3
18、)At times(4)Take your timein ones turn轮到某人；接着教材原句P26：Thus they have，in their turn，become the most important animals on the planet.于是，他们接着成为了这个行星上最重要的动物。When it is in my turn，I am too excited to speak.当轮到我时，我激动得都说不出话来了。in turn依次，轮流；反之，反过来by turns轮流；交替地take turns to do sth.轮流做某事It is ones turn to do s
19、th.轮到某人做某事The customer praised the manager，who in turn praised his staff.顾客表扬了经理，经理转而表扬了他的职员。All theories are derived from practice and in turn serve practice.所有的理论都来源于实践，并反过来为实践服务。Now it is your turn to look after the children.现在轮到你照看孩子了。6.People try to avoid public transportation delays by using t
20、heir own cars，and this_creates further problems.Ain shortBin caseCin doubtDin turn解析：本题考查短语意思辨析。in short意为“总之，简言之”；in case意为“假使，免得，以防万一”；in doubt意为“感到怀疑，被怀疑的”；in turn意为“反过来，依次，轮流”。根据句意要求应选D。答案：Dprevent.from.阻止/制止做教材原句P26：They are putting too much carbon dioxide into the atmosphere，which prevents hea
21、t from escaping from the earth into space.他们把过多的二氧化碳释放到大气层中，这使得地球上的热不能释放到太空中去。No one can prevent this plan from being carried out.谁也不能阻止这个计划的实施。Once he has made up his mind，nothing can prevent him from doing so.一旦他下定决心，什么也不能阻止他这样做。His advice prevented/kept/stopped me from making a serious mistake.他的
22、忠告使我免于犯严重的错误。He wears sunglasses to protect his eyes from the strong sunlight.他带墨镜保护眼睛使其免受太阳光的伤害。7.完成句子Measures have been taken to_(阻止河流污染)答案：prevent/stop/keep the river from being pollutedcheer up(使)高兴；使振奋；感到振奋教材原句P31：I cheered up immediately and floated weightlessly around in our spaceship cabin w
23、atching the earth become smaller and the moon larger.我立刻高兴起来，由于失重我在太空舱里飘来飘去，我望着(身后的)地球越来越小，而(前方的)月亮越来越大。Give Mary a call，she needs cheering up.给玛丽打个电话，她需要人安慰。Cheer up！Our troubles will soon be over.振作起来！我们的困难很快就会过去。When Im feeling sad my mother tells me funny stories to cheer me up.当我感到忧伤时，我的母亲就给我讲有
24、趣的故事让我高兴起来。They do this in order to encourage crowds to cheer their sports team.他们这样做是为了鼓励人们为他们的球队加油。8.Im thinking of the test tomorrow.Im afraid I cant pass this time._！Im sure youll make it.AGo aheadBGood luckCNo problemDCheer up解析：句意为：我正在考虑明天考试的问题，恐怕这次我会不及格。振作起来！我相信你会通过的。根据上下文只有Cheer up“振作起来”符合题意
25、，而Go ahead继续，Good luck好运气，No problem没问题，均不符合题意。答案：DBut when I tried to step forward，I found I was carried twice as far as on the earth and fell over.而当我试着向前迈步的时候，我发觉我被送出去很远，步子的跨度竟是在地球上的两倍，因而我摔倒了。倍数表达法：(1)“A倍数形容词或副词的比较级thanB”，表示“A比B大(长、高、宽等)多少倍”。(2)“A倍数as形容词或副词的原级asB”，表示“A是B的多少倍”。(3)“A倍数the size/heig
26、ht/length/width，etc.ofB”，表示“A是B的多少倍”。(4)A倍数what从句There are five times more books in our library than in yours.我们图书馆里的书比你们图书馆里的书多五倍。He has read twice as many books as I have.他读的书是我读过的两倍。My house is twice the size of my parents.我的房子是我父母的两倍大。Our city has experienced twice as much rain this year as it d
27、id last year.我们城市今年的雨水是去年的两倍。9.According to statistics，a man is more than twice as likely to die of skin cancer_a woman.AthanBsuchCsoDas解析：阅读题干可知此题考查倍数句式的同级比较句型，其构成应为：倍数词as形容词/副词原级as另一比较对象，所以此空应填as。答案：D10Peters jacket looked just the same as Jacks，but it cost_his.Aas much twice asBtwice as much asCm
28、uch as twice asDas twice much as解析：本题句意应为：彼得的夹克衫看上去与杰克的相同，但价格却是他的两倍。表达倍数用“倍数词asadj.as”结构。答案：B11Ten years ago the population of our village was_that of theirs.Aas twice large asBtwice as large asCtwice as much asDas twice much as解析：句意为：十年前我们村的人口是他们村的10倍。形容词比较级的结构之一为：倍数as形容词原级as.答案：B12Some parts in So
29、uth China have experienced_this year as they did last year.Atwice as much rainBrain twice as muchCas twice much rainDtwice rain as much解析：考查倍数表达法“倍数as many/muchn.as.”。因倍数词为前位限定词，排除B、C两项，而D项不合句型结构。答案：A“Oh dear，” I cried，“walking does need a bit of practice now that gravity has changed.”“天哪，”我大声说：“重力改
30、变了，看来走路也的确需要练一练了。”now that由于；既然，引导原因状语从句，有时that可以省略。Now that I have nothing to do，I can enjoy music for a little while.既然我无事可做，我可以享受一会儿音乐了。Now you have grown up，you can make up your mind by yourself.你已长大了，可以自己作决定了。辨析：because，since，as，for与now that(1)because语气最强，一般指事情发生的直接原因，回答提问时，一般放在主句之后。He was abse
31、nt from the meeting because he was ill yesterday.昨天他没参加会议是因为他病了。(2)since语气较弱，指双方都明确的原因或众所周知的原因，侧重主句，从句表示显然的或已知的理由。Since you cant answer the question，Ill ask someone else.既然你回答不出这个问题，我就问别人了。(3)as语气比because弱，所引导的从句表示的是显而易见的原因和理由，从句一般放在主句前。As there was no answer，we wrote him again.鉴于他没有回复，我们又给他写了封信。(4)
32、for是并列连词，表示推断的原因，或对前一分句补充说明理由。for表示这一用法时需放在两句之间。It must have rained last night，for the ground is wet.昨晚肯定下雨了，因为地面是湿的。13.Did you return Freds call?I didnt need to_Ill see him tomorrow.AthoughBunlessCwhenDbecause解析：句意为：你给Fred回电话了吗？我没必要回，因为明天我要去见他。though虽然；unless除非；when当时；because因为。答案：D14_youve got a c
33、hance，you might as well make full use of it.ANow thatBAfterCAlthoughDAs soon as解析：句意为：既然你得到了一次机会，不妨充分利用它。答案：A.完成句子1_(既然) youve finished your homework，you can go and play football to have a rest.答案：Now that2Do your best in your career，and youll succeed _(迟早)答案：in time3_(当心) for his temper！Hes not eas
34、y to deal with.答案：Watch out4Whenever Im upset，she always has a good idea to make me_(感到高兴)答案：cheer up5The first modern robot_(诞生) in 1954，created by George Davel and operated digitally.答案：came into existence6The government has taken measures to_ the cultural relics_(阻止被损坏)答案：prevent；from being damag
35、ed.巧思妙解1_matters most in learning English is enough practice.AWhatBWhyCWhereDWhich解析：本题考查名词性从句的用法。根据句子的分析，_matters most in learning English是主语部分，is enough practice是谓语部分。再分析主语部分，发现缺少的是主语，指的是事情，所以应该用一个代词what。答案：A2_worries me the way he keeps changing his mind.AThisBThatCWhatDIt解析：考查代词it的用法。用做形式主语。真正的主
36、语是the way。答案：D3_parents say and do has a lifelong effect on their children.AThatBWhichCWhatDAs解析：考查名词性从句。所填词引导主语从句，引导词作从句的宾语，指物；用what。答案：C4_he couldnt understand was_，as a teacher of Chinese，he was asked to teach history.AWhat；thatBWhat；whatCWhat；whichDWhy；how解析：第一个空格引导主语从句，且从句缺宾语，故用what，而不用在从句中作状语的
37、why；第二个空格引导表语从句，且该从句不缺任何成分，故用在表语从句中不作成分的that，而不用在从句中作成分的what，which，how。答案：A5_is known to us all is that the 2012 Olympic Games will take place in London.AItBWhatCAsDWhich解析：句意为：我们都知道，2012年奥运会在伦敦举行。本题是由一个主语从句_is known to us all和一个表语从句that the 2012 Olympic.组成，主语从句中缺少主语，用what指代这一事件，注意本题可以转化为It is known
38、 to us all that the 2012 Olympic Games will.(it作形式主语)；以及As is known to us，the 2012 Olympic Games will.(As引导非限制性定语从句)。答案：B.语法专练本单元语法主语从句1Please remember_wins your respect is not your background but your knowledge and virtues.AthatBwhatCwhichDwhere解析：考查主语从句。句意为：请记住，为你赢得尊重的不是你的背景，而是你的知识和美德。题干中remember之
39、后为宾语从句，其中，what wins your respect又为主语从句。答案：B2It is uncertain_side effect the medicine will bring about，although about two thousand patients have taken it.AthatBwhatChowDwhether解析：句意为：尽管说已经有大约两千名病人服用了这种药品，但是，这种药品会带来什么副作用还不明确。本题考查名词性从句。本题设空处须引导主语从句，that 无实际意义，在从句中不作成分；what 什么，在从句中可作主语、宾语和表语，还可修饰名词作定语；h
40、ow 如何，多么；在从句中作方式状语或修饰形容词；whether 是否，在从句中作状语，不修饰名词。side effect 为名词短语，故须用what 修饰。答案：B3_young people see and hear in the media helps them to figure out how the world works.AWhichBThatCWhatDHow解析：考查主语从句。语境为：年轻人通过媒体听到的和看到的事情帮助他们了解周围的世界是如何运转的。“young people see and hear in the media”中动词see和hear缺少宾语，因此空白处应填
41、What。答案：C4Mary looks down today.What is up?Well，_happened between Mary and me is none of your business.AwhereverBwhoeverCwhateverDno matter what解析：whatever引导主语从句，在从句中作主语。答案：C5(2011东城第一学期检测)It makes his life quite different_he has received education abroad.AthatBwhichCwhatDhow解析：考查连词。it作形式主语，that引导的主语从句作真正的主语，that不可以省略。从句部分主谓宾成分齐全，可以排除B、C；how表方式，不符合语境。答案：A
