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Unit 3 Science versus natureSection Ⅰ Welcome to the unit& Reading-Pre-readingThe Chinese scientist behind the development of the world's largest cloning factory in Tianjin, China, claims (声称) that the facility (设备) possesses the technology to clone humans. He added that the only thing holding them back from cloning a person is the fear of how the public would react to it.The giant cloning factory, which is due to open within the next seven months, is backed by Boyalife group in collaboration with South Korean company Sooam Biotech Research Foundation. It plans to be cloning 1 million cows a year by 2020, and also aims to clone other animals such as racehorses and police dogs. “Everything in the supermarket looks good —it's almost all shiny, goodlooking, and uniformly shaped. For animals, we weren't able to do that in the past. But with our cloning factory, we choose to do so now，” Boyalife CEO Xu Xiaochun said.There are different opinions when it comes to whether the cloned beef is safe for human consumption. The US Food and Drug Administration says it is, but the European parliament (议会) disagrees and has backed a ban on cloned animals andproduce in the food chain, reports the DailyMail.Section Ⅰ Welcome to the unit & Reading —PrereadingThe perfect copyScientists have announced①that they have cloned② the first human embryo ③. This has caused much debate round the world. On the one hand④， some scientists point out⑤ that if you clone an embryo, you can produce valuable human tissues ⑥— such as bone or lung tissue — that could be used to save⑦ human lives. On the other hand⑧， many people, including some scientists⑨，disagree and are afraid that, if mankind toys with⑩nature in this way⑪， we may be⑫on our way to producing a reallife⑬ Frankenstein's monster⑭.Cloning is producing an exact⑮ copy of a plant or an animal⑯using its cells ⑰. The first mammal⑱to be cloned successfully⑲from an adult cell was Dolly the sheep⑳. She was born in 1996 and died in early 2003, at a much younger age than normal. When she was born, many people were worried that cloning would ①announce vt.宣布，宣告，通知announcement n．宣告，通告，通知②clone[kləʊn]vt.克隆n.克隆出来的动物或植物③embryo['embrIəʊ]n．胚胎④on the one hand一方面⑤point out 指出⑥tissue['tIʃuː]n．(生物的)组织；纸巾⑦be used to do ... 被用来做……⑧on the other hand另一方面⑨介词短语including some scientists＝some scientists included (n.＋p.p.)。
高中英语Unit3Scienceversusnature专项测试同步训练2020.031,All the candidates were ______ the street to be named after a great man ______ his great contributions to the city.A. in favor of; in need ofB. in praise of; in favor ofC. in praise of; in need ofD. in favor of; in honor of2,In today’s world, almost everyone knows that air pollution and water pollution are harmful to people’s health. However, not all the persons know that noise is also a kind of pollution, and that is harmful to human health, too.People who work and live under noisy conditions usually become deaf. Today, however, scientists believe that 10 percent of workers in Britain are being deafened by the noise where they work. Many of the workers who print newspapers and books, and who weave （织） cloth become deaf. Quite a few people living near airports also become deaf. Recently it was discovered that many teenagers in America could hear no better than 65-year-old persons, for these young people like to listen to pop music and most of pop music is a kind of noise. Besides, noise produced by jet planesor machines will make people’s life difficult and unpleasant, or even make people ill or even drive them mad.It is said that a continuous noise of over 85 decibels（分贝）can cause deafness. Now the governments in many countries have made laws to control noise and make it less than 85 decibels. In China, the government is trying to solve not only air and water pollution problems but also noise pollution problems.1. The passage is mainly about ______ .A. air pollutionB. water pollutionC. noise pollutionD. world pollution2. According to the passage, a continuous noise of _______decibels can make people deaf.A. less than 85B. less than 65C. about 65D. more than 853. 10 percent of the workers in Britain are being deafened because _______ .A. they are working in noisy placesB. they often listen to pop musicC. they live near airportsD. they are too busy to listen to others’talk4. The government of China is trying to reduce ______.A. only the air pollutionB. only the air and water pollutionC. only the water pollutionD. the air, water and noise pollution3,______ by many well-known experts and film stars, the product was very popular at one time.A. To advocateB. Having advocatedC. AdvocatingD. Advocated4,Municipal(市政府) regulations normally ban anything from smoking in public places to parking in certain zones. But officials in the Brazilian town of Biritiba Mirim, 70km (45 miles) east of Sao Paulo, have gone far beyond that. They plan to prohibit residents from dying early because the local cemetery(墓地) has reached full capacity.There’s no more room to bury the dead, they can’t be cremated(火化) and laws forbid a new cemetery. So the mayor has proposed a strange solution: outlaw death. Mayor Roberto Pereira says the bill is meant as a protest against federal regulations that prohibit new or expanded cemeteries in preservation areas. “They have not taken local demands into consideration”, he claims.A 2003 decree(法令) by Brazil’s National Environment Council forbids burial grounds in protected areas. Mr. Pereira wants to build a new cemetery, but the project has been stopped because 98% of Biritiba Mirim is considered a preservation area. Biritiba Mirim, a town of 28,000 inhabitants(居民), not only wantsto prohibit residents from passing away. The bill also calls on people to take care of their health in order to avoid death. “I haven’t got a job, nor am I healthy. And now they say I can’t die. That’s ridiculous,” Amarildo do Prado, an unemployed resident said.The city council is expected to vote on the regulation next week. “Of course the bill is laughable, illegal, and will never be approved,”said Gilson Soares de Campos, an assistant to the mayor. “But can you think of a better resolution to persuade the government to change the environmental decree that is prohibiting us from building a new cemetery?”The bill states that “offenders will be held responsible for their acts”. However, it does not say what the punishment will be.1. What is the bill to be proposed by the officials in Biritiba Mirim?A. Ban on smoking in public places.B. Ban on parking in certain zones.C. Prohibiting residents from dying early.D. Forbidding buried grounds in preservation.2. What can we infer from the phrase “have gone far beyond that”?A. Officials in Biritiba Mirim have nothing of these regulations.B. The bill to be proposed by officials in Biritiba Mirim is much too unexpected.C. Officials in Biritiba Mirim have been to many places around the world.D. The officials in Biritiba Mirim have built too many cemeteries in their town.3. What’s the attitude of the mayor of Biritiba Mirim towards the federal regulations?A. He objects to them.B. He gives strong backing to them.C. He asks the residents for advice on them.D. He remains silent about them.4. Which of the following is TRUE according to the article?A. The mayor of the town wants to build a new cemetery against federal regulation.B. The residents of the town sing the praises of the bill.C. The government is going to change the environmental decree.D. No better resolution of the problem has been thought out.5,A San Francisco self-service laundry（自助洗衣店） may be one of the world’s most unusual places to surf the Internet but a fashionable club on Moscow’s Red Square is definitely the most fashionable, according to a Yahoo survey of the globe’s best cybercafés(网吧).The winners of the first Yahoo Mail Internet Café Awards werepublished on Wednesday to mark the 10th anniversary(纪念日) of the world’s first cybercafé in London’s West End.Among the top picks were the unusual Brain Wash in San Francisco, named as “the height of Internet café with self-service laundry”and Moscow’s Phlegmatic Dog, selected as Most Stylish with its “unique combination of comfort and hi-tech”. Taking the Best UK Internet Caféaward was CaféCurve in Brighton, southern England-“a must for anyone who likes style, comfort, typing and keeping in touch”. And the title of the world’s Most Remote Internet Caféwent to an internationally funded centre in Timbuktu, Mali.The winners were chosen by a team of judges who considered travelers’more than 1,000 nominations(提名) of cybercafés in 111 countries. The results have been collected in a Rough Guides e-book.In the decade since London’s Café Cyberia first opened its doors in 1994, approximately 20,000 Internet cafés have sprung up in 171 countries, according to Yahoo Mail.“Despite the fact that home and work Internet access is now commonplace, Internet cafés fulfill the same role as they did 10 years ago,” Eva Pascoe, a co-founder of Café Cyberia, said in a statement. “They are the post offices of the wired generation.”1. The purpose of Yahoo Mail Internet Café Awards is ______ .A. to honor the 10th anniversary of YahooB. to celebrate the rapid development of Internet cafésC. to mark the 10th anniversary of London’s Café CyberiaD. to promote the most fashionable club2. Which is NOT the correct match of the following cybercafés?A. Café Curve in Brighton-the Best UK Internet Café awardB. The internationally funded centre in Timbuktu - the world’s Most Remote Internet CaféC. Moscow’s Phlegmatic Dog-the most fashionableD. Brain Wash in San Francisco-combination of comfort andhi-tech3. What does the last sentence “They are the post offices of the wired generation.” imply?A. Internet surfers communicate with each other on Internet rather than by posting letters.B. Internet cafes start the same service as post offices.C. Post offices and Internet cafes are of the same importance to surfers.D. Post offices turn to be Internet cafes in e-mail times.6,Some people are sitting on the grass; others are walking along the lake, ______ .A. chatting and to laughB. to chat and to laughC. chatting and laughingD. chatted and laughed答案1, D2, CDAD3, D4, CBAD5, CDA6, C。
课后分层集训Unit 3 Science and nature (A卷)Ⅰ.阅读理解(2017·昆明高三检测)In a science fiction future，we'll arrive at the hotel in our driverless taxi，check in at the reception desk staffed by androids，and then follow the robot porter (行李员) as it carries our bags to our room.However，this is already a science fact.Robots are already working in some hotels—the Hennna Hotel in Sasebo，Japan is manned entirely by machines.In a Marriott hotel in Ghent，Belgium，a humanoid robot named Mario has been working since June 2015.He welcomes guests in 19 languages.Another robot has just taken up a concierge (接待员) position at a Hilton McLean hotel in Virginia.So the rise of the hotel machines seems unstoppable，but will guests really want to stay in robotrun hotels？And will it come at the cost of human interaction and human jobs?U．S.online bookings company Travelzoo gathered some statistics.Of the 6，000 travellers surveyed globally，nearly two thirds said they'd be comfortable with the idea of being looked after by machines.Richard Singer，Travelzoo's European president，says he welcomes the day when apps and machines will get us from lobbies(大堂) to rooms.But how to stop a robot stealing your job?“A lot of jobs considered nonautomatable in the past are now automatable，”said Carl Benedikt Frey from University of Oxford，an expert on technology and employment.But Frey says it's still too early to say what effect robots will have on employment levels.In other words，even though robots may soon be checking us in，that's no excuse for us to be out.【语篇解读】在宾馆服务的机器人以往只出现在科幻小说中，而如今这种机器人已经存在于现实生活中。
号顿市安谧阳光实验学校Unit 3 Science versus nature 同步练习(三)总分 100分时间 45 分钟成绩评定 __________________根据首字母提示或中文提示补全单词: （每题2分，共20分）1. A S__________ has many fathers, but failure is an orphan.2. B I want you to live and learn for the b__________ of mankind.3. B In c______________ of your bad work, I am forced to dismiss you.4. A His educational ideas were in a_____________ of his time.5. C We said things would turn out well, and s__________ enough they did.6. A I ___________(完全) disagree with almost everything we’ve heardfrom him.7. A Do you find it hard to keep up with the ______________(医学)development?8. A Using other people for your own profit is an _____________ (不道德) action.9. B During the summer vacations, some teachers attend __________(研究班) at college.10. B As they had no children of their own, they ___________ (领养) anorphan.翻译下列句子：（每题6分，共30分）1. A这里的食物比上海便宜，而衣服却要贵些。
课时跟踪练(一) Welcome to the unit & Reading Ⅰ.阅读理解APlant cloning has been an agricultural technique used by farmers and gardeners for centuries. Grafting (嫁接) is a common form of plantcloning. Many plants in nature actually clone themselves andreproduce asexually.Cloned plants are much more predictable than normal plants,so their yield (产量) is more reliable. Cloned plants also reproduce faster, limiting the amount of time between planting and harvesting. It is also often cheaper to produce seeds through cloning than through traditional methods. Plants can essentially be optimized so that farmers or individual growers always have the best seeds available. With more yield at a faster rate, farms can produce more food for more people while decreasing overall costs.Cloning can be used to wipe out diseases that previously killed off entire fields of crops. This would make plants immune (免疫的) to the kinds of diseases that farmers and gardeners around the world fear each year. Crop failures due to disease and virus could become a thing of the past. Also, plants that are near extinction can be brought back to life through cloning.Through cloning scientists can develop “super” fruits and vegetables of superior nutritional quality. This could make for a healthier population overall. This is already being done through selective pollination (授粉), and genetic cloning could take it to the next level.By plant cloning we have a population of identical plants and all these plants equally suffer from the same diseases, but in nature the weak would die and the strong would survive. While there are some dangers to consider with plant cloning, there are plenty of benefits that could prove vital to the propagation (繁衍) of the human species.语篇解读：本文主要讲了克隆植物的好处：增加农作物产量、提高植物的免疫力、提高水果和蔬菜的质量等。
Unit 3单元加餐练[语基过关卷]Ⅰ. 单词拼写1. The sunrise is a beautiful (景象)，which attracts many people.2. In our daily life，we need (耐心) in many ways.3. That man has no particular (毛病) except that he smokes too much.4. He was found (闲逛)aimlessly about the house.5. Many young people went to (寻找)their fortune abroad.6. He is not a wealthy person；on the (相反)，he has been in heavy debt.7. As a punishment，she was not (允许)to attend any school activity.8. As a student，it is bad (礼貌)to come late to class.9. The police were on the (现场)within a few minutes of hearing about the crime.10. If you have just opened a bank (账户)，can you get a loan from the bank? Ⅱ. 选词填空bring up，stare at，by accident，go ahead，on the contrary，as for，account for，a large amount of1. Don’t stare at me like that. It’s not my fault anyway.2. You were not boring us. On the contrary，your wonderful speech interested us a lot.3. As for you，you should keep your promise to help her out of trouble.4. He could not account for his absence from school，so the teacher phoned his parents.5. I met one of my schoolmates on the street by accident.6. After the rain stopped，they went ahead with their work of digging the canal.7. I was brought up by my grandparents for the first years of my life.8. If you want to keep up with the times，you have to get a largeamount of information.Ⅲ. 补全句子1. The old man found his hometown much changed.这位老人发现自己的家乡有了很大的变化。
Unit 3 Science versus nature基因联系听觉和触觉Sound and touch may seem completely separate, except possibly when playing the game Operation. But it turns out that the two senses are actually quite entwined: a new study finds that people with hearing issues often also have problems with touch.听觉和触觉似乎是彼此完全独立的——除了在玩军事游戏的时候需要二者都用上。
但事实证明，这两个感官实际上是紧密联系的。
一项新的研究发现，有听觉障碍的人往往也存在触觉障碍。
Researchers compared sets of twins, some identical and some fraternal. The identical twins, obviously, have the same genome and thus the same mutations. The fraternal twins have genetic differences. Other subjects in the study were congenitally deaf.研究人员比较了几对双胞胎，其中既有同卵双生胎也有异卵双生胎。
很明显，同卵双生胎具有相同的基因，因此它们的变异也相同。
异卵双生胎的则存在基因差异。
其他的受试者则先天性耳聋。
To determine how acute their hearing was, the subjects reported whether they could hear various high frequencies. To evaluate touch they were asked to differentiate different surfaces with their fingertips.为了确定他们的听觉是否敏锐，研究人员让受试者说出他们是否能听到各种各样的较高频率。
Section Ⅳ Grammar&Writing语法图解探究发现①Worried about the journey, I was unsettled for the first few days.②If I had the chance, I would have a cloned baby right now.③At the top of the school is the headmaster, known as the brain.④I think the scientific advances mentioned in your article are fantastic!⑤He is always working in his lab, trying to figure out all the mysteries that make him puzzled.⑥For example, cloned animals are not very healthy — they nearly always live brief, painful lives compared with ordinary animals.⑦He was deeply moved by the moving story.[我的发现](1)上述例句中加黑部分都是动词ed形式。
(2)②句和④句中的动词ed形式都作定语。
单个动词的ed形式作定语时，要放在被修饰词之前，动词ed短语作定语时，则要放在被修饰词之后。
(3)⑤句中的动词ed形式作宾语补足语。
(4)①句、③句和⑥句中的动词ed形式在句中分别作原因状语、伴随状语和时间状语。
(5)⑦句中动词ed形式作表语，动词ing形式作定语，二者起到的都是形容词的作用，但在用法上有一定的区别。
一、动词ed形式的构成和意义1．动词ed形式的构成动词ed形式通常是由动词后加“ed”构成的，少数动词的ed形式有不规则变化形式。
感顿市安乐阳光实验学校Unit3 Science versus nature完形填空练习By the time that a student reaches his senior year in high school, he is likely to believe that he is an expert in reading. No matter how(1) ______ he is, he can still improve. How do you read an article ina textbook? Do you have a certain (2) ______ of doing it or do you just(3) ______ at the beginning and keep reading (4) ______ you come to the end?(5) ______ students say that they use the “slow and sure” method. By this they mean they read every sentence slowly and (6) ______. Every time they come to an (7) ______ word they stop (8) _______ what it means and, if necessary, looking it up in the (9) ______. In this method a person (10) ______ has no time left for (11) ______ what he has read, for he has used all his (12) ______ in trying to get the meaning of each word to (13) ______ that he (14) ______ everything.Other students use what has been (15) ______ the review method. Herea person tries to arrange his time (16) ______ he can read his lesson(17) ______ twice. This type of reading is (18) ______ than the “slow and sure” method, for the lesson (19) ______ be read rapidly or there will not be (20) ______ time left for a second reading. Which method do you think better?1. A. high B. weak C. good D. well2. A. idea B. way C. wish D. plan3. A. stop B. read C. do D. start4. A. after B. before C. until D. unless5. A. Few B. Some C. No D. All6. A. carefully B. carelessly C. correctly D. eagerly7. A. useful B. important C. unknown D. old8. A. thinking B. to think C. to understand D. to know9. A. text book B. grammar book C. English DictionaryD. dictionary10. A. always B. nearly C. almost D. probably11. A. learning B. reviewing C. preparing D. considering12. A. time B. energy C. mind D. money13. A. think B. be sure C. believe D. answer14. A. wants B. remembers C. forgets D. understands15. A. called B. said C. given D. known16. A. because B. but C. as D. so that17. A. at most B. no more than C. at least D. only18. A. shorter B. faster C. nicer D. more important19. A. can B. may C. must D. need20. A. some B. no C. little D. enough答案：1. C 11. B2. B 12. A3. D 13. B4. C 14. D5. B 15. A6. A 16. D7. C 17. C8. B 18. B9. D 19. C10. D 20. D。
Unit 3 Science versus nature第一部分听力(满分30分，限时20分钟)第一节(共5小题；每小题1.5分，满分7.5分)听下面5段对话，每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。
听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1．What are the speakers talking about?A．How the man became a driver.B．How the man had the accident.C．How the man bought the ticket.2．What does the man suggest the woman do?A．Repair the old TV set.B．Buy a new TV set.C．Keep the old TV set.3．How many people failed in the first interview?A．4. B．12. C．16.4．How will the guests go to the airport?A．By car. B．By bus. C．By taxi.5．Where will the man go?A．To the theatre.B．To the library.C．To the church.第二节(共15小题；每小题1.5分，满分22.5分)听下面5段对话或独白。
每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。
听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。
每段对话或独白读两遍。
听第6段材料，回答第6、7题。
6．When did Dr. R. Sun plan to check out?A．On January 7th.B．On January 14th.C．On January 21st.7．What does the man want to do?A．Book a room.B．Cancel a booking.C．Change a booking.听第7段材料，回答第8、9题。
Unit 3 单元加餐练(一) 完形阅读组合练Ⅰ.完形填空Maybe you've lost your job. Maybe you didn't get the __1__ in your job. Maybe your sweetheart __2__ with you. People say “Don't take it personally”and “Don't let it get to you”， but that's very __3__ to do.If you're feeling disheartened, __4__ are some strategies (策略) for making yourself feel better? It's pretty clear that __5__ “I'm the greatest！” or winning a prize along with every other secondgrade soccer player isn't a good way to __6__ healthy selfrespect.Then what can you do to feel better? Here are some __7__ to follow：Do a good deed. This is as selfish as it is selfless; you'll __8__ as much as the person you're helping. I had a friend who __9__ a period of vast rejection; she was fired from her __10__， she didn't get into the graduate program to which she'd __11__， and her boyfriend split up with her. Everything worked out fine __12__，and I asked her how she got through such a(n) __13__ time. She said, “I was __14__ addicted to doing good deeds for other people. It was the only way I could make myself feel like I wasn't a total loser.”Keep a resolution (决心). Not only will you benefitfrom exercising or __15__ out your garage, but you'll also get a boost (激励) from the mere fact that you made a __16__ and stuck to it.Boost your __17__. Studies show that when you're feeling energetic, you're much more likely to feel good about yourself. Most important：get enough sleep.Challenge yourself __18__. This strategy doesn't work for me, but I know that many people feel great __19__ whitewater rafting, bungee jumping, or rollercoaster-riding. For the less daring, a great run, or bike ride can do the __20__.语篇解读：本文是说明文。
当你遇到不开心的事情，遭受挫败，心灰意冷的时候，有什么方法能让自己感觉好点呢？对此作者给了一些建议。
1．A.promotion B．giftC．match D．break解析：选A 根据上下文可知，作者在列举一些让人感到不开心的事情。
在职场中，没能获得晋升就是其中之一。
promotion“提升，升职”；gift“礼物”；match“比赛”；break “休息”。
2．A.kept up B．put upC．broke up D．made up解析：选C 或许你的心上人和你分手了。
break up with sb.“与某人分手”；keep up with sb.“跟上某人”；put up with sb.“容忍某人”；make up with sb.“同某人言归于好”。
3．A.easy B．hardC．dangerous D．pleasant解析：选B 句意：人们说“你别往心里去”，“不要让它对你产生影响”，但是那做起来却很难。
but提示上下文存在转折关系，说明事情是说起来容易，但是做起来难(hard)。
4．A.which B．howC．where D．what解析：选D 如果你觉得心灰意冷，有什么策略能让你感觉好点儿呢？5．A.hearing B．praisingC．knowing D．repeating解析：选D 根据下文“I'm the greatest！”以及常理推断，在遭受挫败的时候，人们往往对自己重复(repeating)一些鼓励的话，让自己心情好起来。
6．A.have B．loseC．build D．hurt解析：选C 重复“我是最棒的！”或者在和其他二流足球队员比赛时获胜都不是增强自尊的好方法。
build此处意思是“逐渐增强”。
7．A.ideas B．tipsC．plans D．methods解析：选B 根据下文内容可知，这是作者提出的几点建议。
tip 常用来表示一些有用的小建议；idea“主意，想法”；plan“计划”；method“(系统的)方法”。
8．A.benefit B．repayC．reject D．demand解析：选A 你会和你所帮助的人获得一样多的收益。
benefit“受益”；repay“偿还”；reject“拒绝接受”；demand“要求”。
9．A.went through B．came acrossC．looked for D．waited for解析：选A 这里指经历了一系列严重的挫败。
go through“经历”；come across“偶然碰到”；look for“寻找”；wait for“等候”。
10．A.house B．incidentC．job D．boss解析：选C 介词from提示这里指在工作中被解雇。
11．A.appealed B．listenedC．reacted D．applied解析：选D 她申请读研失败。
apply“申请”；appeal“呼吁”；listen“听”；react “回应”。
12．A.in the beginning B．in the endC．in a moment D．in a sense解析：选B 一切最终都顺利了。
in the end“最后，结果”；in the beginning“起初”；in a moment“立刻，马上”；in a sense“从某种意义上说”。
13．A.wonderful B．toughC．unforgettable D．busy解析：选B 根据上文语境可知，她度过的是一段困难的时期。
14．A.practically B．hardlyC．carefully D．unwillingly解析：选A 此处副词practically相当于almost，意思是“几乎，差不多”。
hardly “几乎不”；carefully“仔细地”；unwillingly“不情愿地”。
15．A.working B．leavingC．finding D．cleaning解析：选D 锻炼或者打扫车库会让你受益。
clean out“把……彻底打扫干净”；work out“计算出，解决”；leave out“遗漏，略去”；find out“找出，查明”。
16．A.bet B．differenceC．promise D．record解析：选C 根据“Keep a resolution (决心)”可知C项意义接近，即做出承诺并且信守承诺。
make a promise“许诺”；make a bet“打赌”；make a difference“有影响，起作用”；make a record“录制唱片”。
17．A.energy B．confidenceC．courage D．ability解析：选A 根据下文语境以及energetic一词的提示可知该段小标题是Boost your energy(养精蓄锐)。
18．A.mentally B．physicallyC．successfully D．naturally解析：选B 根据下文提到的极限运动可知，这里指Challenge yourself physically(挑战体能)。
19．A.before B．uponC．until D．after解析：选D 很多人在进行了激流皮划艇运动、蹦极或乘坐过山车后感觉很好。
20．A.service B．businessC．trick D．favor解析：选C do the trick是固定短语，意思是“起作用，奏效，达到目的”。
Ⅱ.阅读理解The story began with a young mother who had three sons. Unfortunately, the youngest son developed slow thinking skills, not having the intelligence of hisbrothers.With double duty as the mother of the household, she wasexhausted, so that the youngest was often the garget of anger andannoyance. Bad words, such as “you little fool” and the like,served as a daily meal for the youngest.The words and curses he got from the mother and ridicule from friends convinced him that he was distressing and embarrassing his family. Every morning he woke up with his own face staring from the mirror reflection, he started to say quietly and sadly, “The fool is going to school.”As adult citizens, there was compulsory military service which should be lived. Thus, the youngest son also signed up and started to follow the various tests: a medical, physical ability test and other tests. On the day of the announcement, he was called into the board of examiners.In his mind, he convinced himself that he was the fool and couldn't pass the tests this time as he entered the room with his head down. It was not expected at all. The tests turned out to have the highest praise from the board of examiners.“Congratulations, young man! Your test results are incredible! You are really a great and talented young man.”Words from the board of examiners became the discovery of a new side of himself that was not known in advance. Voice kept echoing in his mind, such as “I, the great man, am in the shower”，“the great man washes his face”，“The talented young man again brushes his teeth” and so on. Confidence and improved selfimage came beyond usual.20 years later, the youngest established himself as a successful businessman who was admired and respected, and received many awards.The mindset and belief are the power behind the success that is within us. Whatever we think and believe in or minds continuously, it will eventually materialize in reality. That's the universally applicable law.语篇解读：来自别人的认可有助于树立信心，在积极的心理暗示的帮助下，相信自己能够成就一番大事，这是成功的重要前提之一。
