1、课时跟踪练(一) Introduction & Reading Pre- reading.阅读理解 AThere are many ways in which human cloning is expected to benefit humans.Dr Richard Seed, one of the leading supporters of human cloning technology, suggests that it may someday be possible to completely change the aging process because of what we l
2、earn from cloning.Scientists believe that they may be able to treat heart attack victims by cloning their healthy heart cells and injecting them into the areas of the heart that have been damaged. Heart disease is the number one killer in the US and several other industrialised countries.There has b
3、een a breakthrough with human stem cells. Embryonic stem cells can be grown to produce organs to repair or replace damaged ones. Skin for burn victims, brain cells for the brain damaged, hearts, lungs, and kidneys could be produced. By combining this technology with human cloning technology, it may
4、be possible to produce needed organs for suffering people that will be free of rejection by their immune systems. Conditions such as Alzheimers disease, Parkinsons disease, heart failure, and other problems can be cured if human cloning and its technology are not banned.Though current treatments for
5、 infertility (不生育) are getting a fair amount of publicity in the news, they, in terms of percentages, are not very successful. Some data shows that current infertility treatments are less than 10 percent successful. Couples go through physically and emotionally painful procedures for a small chance
6、of having children. Many couples run out of time and money without successfully having children. Human cloning could make it possible for many more infertile couples to have children than ever before possible.1According to Dr Richard Seed, we can use cloning technology to _.Aproduce more animalsBmak
7、e people live happilyCmake people look youngerDcure people of many diseases解析：选C推理判断题。根据第二段中的“to completely change the aging process”可知，Richard Seed认为克隆技术可以彻底改变变老的进程。因此推知，克隆技术可以使人们看上去更年轻。2We can learn from the passage that _.Acloning has already been used to treat heart diseaseBwe can treat a mans h
8、eart disease by cloning heartsCmost people in industrial countries suffer from heart diseaseDmore people die of heart disease than of other diseases in the US解析：选D细节理解题。根据第三段最后一句可知，心脏病是美国和其他工业化国家的头号杀手，因此在美国死于心脏病的人要比死于其他疾病的人多。3What is the main idea of the last paragraph?AWith cloning infertile couple
9、s could have children.BTreatment of infertility is not successful.CInfertile couples suffer a lot physically and mentally.DIt is difficult for couples to have more children now.解析：选A段落大意题。联系全文可知，本文的主题是人类克隆技术。最后一段点明了现在治疗不孕的成功率很低，许多夫妇饱受煎熬，最后说明了利用人类克隆技术可以使不孕的夫妇有自己的孩子，因此A项正确。4What is the authors attitud
10、e towards human cloning?ASupportive.BDoubtful.CCautious. DCurious.解析：选A推理判断题。根据文章第一句，特别是关键词benefit及第二至五段(都是讲人类克隆技术会给人类带来益处)可推知，作者对人类克隆技术持支持的态度。BIm sure many of you have seen Star Wars, Jurassic Park, Multiplicity, or many of the other movies that describe cloning. Most of what you see in these movie
11、s is false. What you dont know is that cloning could be dangerous, to the clone and to our society as a whole. Its immoral to have a human clone.What about identity? Humans are promised the right to their own personalities. What would happen if we ignore those rights by giving them someone elses gen
12、etic identity? True, personality is not fixed in genetic fault of the cloned.Also, there is a large power struggle here. Cloning means a degree of power and control over another persons physical identity and that ignores their rights and their only personalities. The person doing the cloning would h
13、ave more power than any parent would have.Cloning would also deal with killing embryos (胚胎). You might not have known, but Dolly, the sheep that was cloned in 1996, was one of over 200 sheep embryos and hers was the only embryo that survived. The rest died or were thrown away. Imagine if the failure
14、 rate was that high when we started to clone humans. More than 200 embryos, the start of 200 human beings, would die for the sake of just one embryo that would have the same DNA as someone else.Cloning someone, at this present time, would be extremely dangerous to the birth mother and the clone. In
15、studies done on cows, 4 out of 12 birth mothers died. There is a very high failure rate, which is showed in the cloning of Dolly. Even if you had a few good embryos, failures have been noticeable in animal tests.So, should we work ahead in the world of cloning? I say no. The risks are greater than t
16、he benefits. Its dangerous to the clone and to the birth mother. We would be killing human lives in the process. It would also be a violation (侵害) of the clones right to its own genetic identity and personality.5The author thinks human cloning is wrong mainly for _ reasons.A2B3C4 D5解析：选C推理判断题。文章的第二、
17、三、四、五段各介绍一条理由，所以共四条理由。6According to the article, what is the authors opinion about identity?ACloning itself gives parents great power over identity.BPeoples identity is completely determined by their genes.CGovernments have the rights to confirm peoples identities.DCloning may prevent people from po
18、ssessing their identity.解析：选D推理判断题。根据第二段中的“Humans are promised the right to their own personalities.”以及后面的内容判断。7From Paragraph 4 we can infer that _.Ahuman cloning is much more difficult than animal cloningBDolly is the most successful one among 200 sheep embryosCcloning means running the risk of wa
19、sting too much effortDnumbers of baby animals are likely to be created by cloning解析：选C推理判断题。根据第四段中的“The rest died or were thrown away.”可知。8Why does the author mention some movies in the first paragraph?ATo introduce the topic of the article.BTo present his idea about the movies.CTo state the conclus
20、ion first.DTo make the article unusual.解析：选A推理判断题。作者在文章的开头提到几部电影，目的是为了引出“克隆”这个话题。CWhen we think of chess, we feel it is a very difficult game. But do you know that most chess players and champions start very young?Take the example of world champion Jose Raul Capablanca of Cuba. He was born in 1888 a
21、nd picked up chess at the age of four by watching his father play. Similarly, Sammy Reshevsky of Poland also made his first moves on the chessboard at the age of four. By 1920, at the age of eight, he was busy touring the cities of Europe as the “wonder boy” who could outplay (击败) adults. Pentyla Ha
22、rikrishna, from India, became a Grandmaster at the age of 15! Harikrishna learnt chess from his grandfather when he was five years old.It is true that not everyone who plays the sport becomes a champion. Yet, it is a fact that the world has become chess crazy, especially children. In India, the sout
23、hern city of Chennai was for long called the chess capital of India. After all it produced champions like Viswanathan Anand, Manuel Aaron and V. Ravi Kumar. Today the_craze has spread across the country. The number of chess clubs has increased, as well as the number of tournaments played through the
24、 year. In Russia and several other European countries, as well as in Canada, chess is part of the school courses.In fact, this is one game that helps children in many ways and not only on the chess board. To play better, it becomes necessary to read chess books. So no one will accuse you of not bein
25、g interested in reading! You have to be able to keep scores, so your arithmetic (算术) gets strengthened. More importantly, you are the general of your army on the board and have to think carefully before making any move. Otherwise your opponent (对手) will corner your troops. For this you have to be ab
26、le to think of various moves and choose the best possible move. Naturally, your thinking becomes faster and you learn to decide faster.If you dont play chess, its time to have a try.语篇解读：作者认为小孩子在很小的时候就可以下国际象棋，且进行这项活动对小孩有很多益处。9What does the underlined part “the craze” in Paragraph 3 refer to?APeoples
27、 love for sport.BPeoples love for chess.CPeoples interest of joining chess clubs.DPeoples eagerness to become a champion.解析：选B推理判断题。根据第三段的“Yet, it is a fact that the world has become chess crazy, especially children.”可知“the craze”指代的是人们对国际象棋的热爱。10What does Paragraph 4 mainly talk about?AThe tips of
28、playing chess well.BThe benefits of playing chess.CThe relationship between chess and study.DThe difficulties of learning to play chess.解析：选B段落大意题。根据第四段的内容可知，主要是讲小孩子学下国际象棋的益处。11Whats the authors purpose of writing this text?ATo tell what the best age to play chess is.BTo show chess isnt a difficult
29、game.CTo encourage children to play chess young.DTo introduce some famous chess champions.解析：选C写作意图题。根据第一段最后一句及最后一段内容可知，作者的主要目的是鼓励孩子从小开始学象棋。.阅读七选五Reasons why you should learn first aidA first aid course only takes a matter of hours to complete but supplies you with all of the knowledge you require t
30、o handle an emergency. _1_ Actually, there are more benefits if you take crucial (关键的) first aid practices._2_ Just imagine for a second that somebody was in a lifethreatening condition and your quick actions saved their lives. What a great feeling to wake up to, remembering that you have prolonged
31、(延长) someones life and allowed them to spend many more happy years with their loved ones.Having the ability to help family and friends in need. When a member of your family or a friend injures himself or herself, theres nothing worse than feeling helpless. In your first aid training, you can learn h
32、ow to treat a variety of medical conditions and injuries. This means that when someone is in need, you will know exactly what to do. _3_Earning the respect of your fellow colleagues. _4_ They will most certainly be grateful for all of your help, because you have provided the correct treatment at an
33、early stage and they can recover quickly. This will reduce the number of days they are absent.Gaining new responsibilities. Your role as a firstaider is very important especially in highrisk working environments where employees are operating heavy machines or working at a great height. _5_ More impo
34、rtantly, your skills will be highly valued to prevent potential accidents.ABut thats not all.BGetting more confidence.CYou will be the goto person in times of need.DHaving the pride you will feel if you help save someone.EWe all know that accidents happen, but we cannot predict the future.FYour knowledge of first aid will increase their chance of making a quick recovery.GStepping in to help your colleagues will have a greater effect than you might expect.答案：15ADFGC
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