Unit 5 Canada-The True North Language points 课时作业（1）--高中英语人教新课标必修三.docx

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1、Unit 5 Canada-The True North language points 课时作业（1）一、阅读理解Scientists have identified the order of the gene of the giraffe for the first time to help explain how the tallest animals on earth developed their remarkably long necks.Being a giraffe is not easy. To pump blood two meters up from the chest

2、to the brain calls for a powerful heart and twice the blood pressure of other mammals. Giraffes also need special safety system to let them bend down for a drink and raise their heads again without feeling dizzy.The animals unique body structure has long been a puzzle for biologists, including Charl

3、es Darwin. Now, by comparing the gene of the giraffe with its closest relative, the short-necked okapi, scientists have solved part of the puzzle by studying changes in a small number of genes responsible both for regulating body shape and circulation. This suggests that the development of a long ne

4、ck and a powerful heart went hand in hand, driven by a relatively small number of genetic changes.The interpretation of the genetic factors behind the giraffes remarkable heart system could also be instructive for human health, since the animals appear to avoid the kind of organ damage often found i

5、n people with high blood pressure.Why giraffes developed their long necks remains open, however. The apparently self-evident idea was to reach ever-higher food supplies, but it has been challenged in the past 20 years by a competing belief that it is actually due to competition among fighting males

6、for females.Unlike long-necked birds, which have additional vertebrae (椎骨), giraffes have the same seven vertebrae found in all mammals, although theirs are greatly extended. 1. A strong heart is very important for a giraffe because it_.A. pumps blood to the brain high above its bodyB. keeps the blo

7、od pressure at a normal levelC. helps the giraffe find a drink at lower placesD. keeps the giraffe safe in different environments2. Scientists compare the gene of the giraffe and the short-necked okapi because the latter_.A. has a quite special body structure B. is a puzzle worth further studyC. is

8、in the same family as the giraffe D. has gone through few genetic changes3. Which possibly caused the giraffe to develop a long neck?A. Its favorite food at high places B. Its attempts to attract femalesC. Its need to avoid organ damage. D. Its greatly-extended vertebrae4. Whats the authors purpose

9、of writing this passage?A. To introduce a new finding of science.B. To explain genetic changes in animals.C. To describe giraffes body structure.D. To challenge a belief of twenty years.二、七选五阅读Its sometimes hard to understand a teenager. Its even harder if a teenager doesnt agree with you. _1_Listen

10、 to what the teenager has to say. _2_ While you may not entirely agree with what hes saying, the tension will be lessened if the teenager feels like you are listening and trying to understand him. Also, he might return the favor and give you the chance to talk as well. Its best to have a conversatio

11、n where both of your opinions matter rather than fight and possibly hurt each other in the process.Understand that while the teenager may appear grown up and perhaps even sound matured, his mind has not fully developed, and he cannot think like an adult all the time. _3_ However, this doesnt mean yo

12、ure completely right or he deserves to be ridiculed or treated like a child._4_ However, remember that the teenager should understand when “no” is “no”. Avoid bringing up a compromise every time you disagree on something. This might teach him that he can always get away with what he wants, whenever

13、he wants it. If the conversation launches into an argument, stop it. Tell him that you both need to calm down and think clearly or the problem will never be solved. If he refuses to listen to you and continues arguing, step out of the room and allow time for both of you to settle down. Do not scold

14、him or shout back. Your words will possibly be lost on the teenager since you both are too angry to listen to each other._5_A. He still needs to learn, and he doesnt know everything.B. Avoid having a bad tone, including accusations in your words.C. This article tells you how to disagree with a teena

15、ger in a kind manner.D. Bring up the topic after a while and make sure you listen to each other patiently.E. People like being listened to, so give him the chance to express his opinion.F. Come up with a compromise if the situation allows one.G. Find the good points the teenager has and mention the

16、negative points as well.三、短文改错We are what we eat. So it is less important to form good eating habits. However，bad eating habits existed among students. Some of us often go to school without breakfast，and some are particularly about food，for example. To keep healthy，we should have healthy diet，which

17、generally include proper amounts of fish，meat，fruit as well as the main food. Besides，wed better have meal regularly. We should try develop good eating habits to build ourselves，preparing ourselves for which our future may require. Only in this way can we have enough of energy to study or live bette

18、r. 四、读后续写阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。A desperate call came into Jimmy Gilleeces bar. A newly married woman who had spent the afternoon at his dive(潜水) beach bar couldnt find her wallet. She didnt care about her ID, credit cards, or $150 in cash but her wedding ring was inside.

19、Gilleece didnt like the idea that stealing could have occurred at his place, so he set out to find the wallet. He spent hours looking through footage(片段) from 16 different surveillance cameras(监控摄像头), watching the womans every step in the bar.At 4pm, the woman went to sit on a bench outside the bar

20、and left when her taxi arrived. Within minutes, a young man in a hoodie(连帽衫) approached the bench, put something in his pocket, and walked off. Gilleece posted a picture on the bars Facebook page. Within hours, Gilleece got a text from 17-year-old Rivers Prather, whod heard about the post from his s

21、ister. Prather Admitted having taken the wallet and told Gilleece hed done it because he hadnt eaten in two days. He said he saw the ring but thought it was fake(假的), so he took the money and threw the wallet off the public docks(码头) into the ocean. Then he bought a sandwich. Gilleece, unsure whethe

22、r he believed Prather, told the teen to meet him at the docks. There, they got to talking, and Prather told him that he wasnt getting along with his family and had been living in the woods for a week. Gilleece, a father of two, looked up and down Pratherhis small figure, his red cheeksand saw him fo

23、r what he was: more of a kid than a criminal. But the police were already on the case, and because of the missing ring, Prather could be facing crime charges. “He would be going to prison,” Gilleece thought to himself. “I had to help him somehow.”So, Gilleece hired two divers to search the waters wh

24、ere Prather had thrown the wallet. Para1When Gilleece and Prather arrived at the docks at noon the next day, a policeman was already waiting there._Para. 2Just then a diver appeared out of the water._一、阅读理解1.A2.C3.B4.A二、七选五阅读1.C2.E3.A4.F5.D三、短文改错We are what we eat. So it is less important to form go

25、od eating habits. However，bad eating habits among students. Some of us often go to school without breakfast，and some are about food，for example. To keep healthy，we should have healthy diet，which generally proper amounts of fish，meat，fruit as well as the main food. Besides，wed better have regularly.

26、We should try develop good eating habits to build ourselves，preparing ourselves for our future may require. Only in this way can we have enough of energy to study live better. 四、读后续写When Gilleece and Prather arrived at the docks at noon the next day, a policeman was already waiting there. Gilleece t

27、old him that he had to wait. Meanwhile, the divers jumped into the water, beginning searching for the ring. A crowd had gathered to watch the two divers scout in the strong current. More than an hour passed, with no sign of the ring. Gilleece grew worried, especially when the policeman began pepperi

28、ng Prather with questions, trying to get him to admit to keeping the ring. Each passing minute increased the chances that he would arrest the young man.Just then a diver appeared out of the water. In his hand was the wallet, and inside was the ring. Cheers erupted from the spectators. Even the polic

29、eman was happy. When Gilleece called the wallets owner, she burst into tears. She immediately dropped the crime charges against Prather, and he was permitted to go through a misdemeanor diversion program for stealing the $150.But it wasnt over for Gilleece. Hed been troubled about Prather sleeping in the cold woods. After long deliberation, he told the teen he could stay with his family until he got on his feet again. 学科网（北京）股份有限公司