1、课时跟踪练(一) Welcome to the unit Rainbow is shy, but CC is outgoing and curious.The differences in the two cats indicate that identical DNA wont necessarily create similar appearances or personalities because there are many other factors that contribute to both surface characteristics and temperament (性
2、情)CC has since gone on to have three healthy kittens via the natural method, and the research that led to her creation became the foundation for a Californiabased pet cloning company called Genetic Savings & Clone, Inc.However, the cat cloning project caused criticism from animal welfare groups, whi
3、ch pointed out that millions of cats are killed in shelters each year due to pet overpopulation.They argued that the large sums of money spent on creating more cats could be put to better use providing homes for strays.There are also objections to the cloning process itself.Many people consider clon
4、ing cruel, as it is a process that can lead to deformities and other problems, which is evident in the fact that many clones die within months or even days of creation.Much to the delight of animal welfare advocates, after cloning five cats in total，Genetic Savings & Clone shut down in 2006.The reas
5、on for the companys close was its inability to make its cloning technology affordable and thus accessible to mainstream consumers.语篇解读：本文是一篇说明文。文章主要讲述的是克隆猫所带来的令人惊讶的结果以及大众对她的看法。9What is the best title of the passage?ACloned Cats A Surprising Development on TechnologyBCloned Cats Cloning Produces Surp
6、rising ResultsCCloned Cats A Cruel Research in ScienceDCloned Cats A Project Caused Criticism解析：选 B 标题归纳题。根据文中的主题讲述的是克隆出来的猫在性格和外观上都有所不同，这是比较鲜明的特点，因此文章的标题应该体现这一点，因此选 B。10Which of the following about CC is TRUE?AThe researchers failed in cloning it in 2001.BIts fur is brown and white as the calico cat
7、.CIt is outgoing and curious as Rainbow.DIt doesnt have similar personalities as Rainbow.解析：选 D 细节理解题。根据文中第三段 “The differences in the two cats indicate that identical DNA wont necessarily create similar appearances or personalities”即可判断答案。11Whats the underlined word in the 6th paragraph similar to?A
8、Criticism. BWaste of money.CDisability. DOverpopulation.解析：选 C 词义猜测题。根据文中第六段 “cruel, other problems”和“which is evident in the fact that many clones die within months or even days of creation”可判断许多人认为克隆残酷和造成残疾和许多问题，出现死亡，因此画线词指的是身体上的残疾。12The reason for the companys demise is that cloning is _.Aa waste
9、 of moneyBcruel sometimesCinaccessible to most peopleDaffordable to consumers解析：选 C 细节理解题。根据文章最后一段 “.its inability to make its cloning technology affordable and thus accessible to mainstream consumers.”可判断答案。.阅读七选五A famous Irish saying stresses the importance of a good sleep, “A good laugh and a lon
10、g sleep are the best cures in the doctors book.” Enough sleep plays an important role in keeping a healthy lifestyle. When you wake up after a good nights sleep, you feel not only fresh, but also enthusiastic, happy, and energetic._1_ For example：Avoid phones or computers in bed.Watching latenight T
11、V, reading on a phone, latenight chatting and surfing not only reduce your sleeping hours but also ruin your health._2_ The light prevents the release of a hormone (激素) called melatonin, which is released in the dark and the signal to your body that its time to sleep.Dont go to bed angry.Arguments m
12、ake you angry._3_ So dont argue with someone else before going to bed.Instead, you should be calm before going to bed to get a good sleep._4_ Eating a heavy meal before going to bed can be bad for you.Eating highcalorie foods before bed can also lead to weight gain.Eating processed or highly salty f
13、oods can make you thirsty, leading to excessive consumption of water, which has an ill effect too.So remember to eat a light meal at night.Avoid drinking.It is true that alcohol (酒精) makes you sleepy, but that is only for the first half._5_ You may experience frequent awakenings, nightmares, headach
14、es, sweats, and many bad results.ADont eat before going to bed.BIt actually disturbs the sleep later.CDont do much exercise before sleeping.DMobiles, computers and TVs cast (投射) a blue and white light.ESo, try to avoid some unhealthy habits before sleeping at night.FIts advised to read a boring nove
15、l or a topic of less interest at night.GThey will disturb you mentally and keep you awake for a long time.语 篇 解 读 ：本 文 是 一 篇 说 明 文 。睡 前 应 避 免 一 些 不 良 习 惯 以 确 保 晚 上 睡 得 好 。1选 E 由下文内容可知，下文列举了一些为了确保良好睡眠，我们应避免做的事情，故空处应选 E 项“因此在晚上睡觉前应该尽力避免一些不健康的习惯”符合语境。2选 D D 项中的“Mobiles, computers and TVs”与本段中的 TV, phone 和 computers 相呼应，并且本空后的 The light 指的是 D 项中的“a blue and white light”，故选 D。3选 G 空前一句讲争论使你生气，空后讲在睡觉前不要与别人争论，因此空处应该继续讲争论的坏处，故选 G。 G 项中的 They 指代 Arguments。4选 A 本空为本段的主旨句。由本段多次出现的 Eating 可知，本段建议睡前别吃东西。故选 A。5选 B 根据本段内容可知，酒精会让你感到困倦，但随后会影响你的睡眠。B 项中的 later 与本空前的 for the first half 相呼应。
