931.87 Smith, J.

　　Practical Reading

　　The People’s Publishing House

　　(1989)

　　(E)

　　The doctor pointed to some bones on his desk. “They are a man’s foot bones,” he said. “They were found deep inside the cave, and I have been examining them. The C14 test shows that they are about 12,000 years old.”

　　“What is the C14 test?” I asked. “It’s a way of finding the age of some things that had been done long ago. The “C” means carbon and carbon is found in all living things. It is also found in the remains of things that lived and died thousands or millions of years ago. Plants and animals take carbon into their bodies from the air and in their food. It stays in their remains.”

　　“Well, there are two kinds of carbon, called carbon 12(C12) and carbon 14 (C14). Both are taken in together, but in living things C12 is one trillion (1012) times more plentiful(大量的) than C14. The two kinds are different in one important aspect.”

　　“C14 is radioactive(放射性的)：it gives out rays of energy at a fixed frequency（频率）. As it does so, it changes to C12 in 5,600 years. Then in the next 5,600 years, half of the remaining C14 becomes C12 and so on. We say that C14 has a half-life(半衰期) of 5,600 years.”

　　“You must have found some C14in these bones, then,” I said.

　　“Yes, I did. But the C12 is now four million times more plentiful. About a quarter of the C14 is left. That means near enough, that two half-lives have passed.” The doctor picked up one of the brown toe bones. “It’s 12,000 years since this toe was kicking about. And the man broke it once. Perhaps he was playing football outside ---with no boots on.”

　　81.People had been using that cave for _________.

　　A. half their lives B. 5,600 years

　　C. something like 12,000 years D. at least 12,000 years

　　82.The word “remains” in paragraph two means ___________.

　　A. things left by ancient people B. dead bodies

　　C. newly-found ancient places D. caves where ancient people lived

　　83.Carbon 14 is a natural element(元素)__________.

　　A. but it kills quickly B. and we all have some in us

　　C. found only in bones D. but it disappears after 5,600 years

　　84.It is true that only __________.

　　A. C14 has a half-life

　　B. old bones have a half-life

　　C. radioactive materials have a half-life

　　D a living thing has a half-life

　　85.Bones from an animal that died recently would show _________.

　　A. a high level of C14 in them B. a low level of C14 i n them

　　C. no C14 in them D. very little C14 in them

　　第Ⅱ卷（笔答题 共35分）

　　Ⅴ.单词拼写（共10题，计10分）

　　86.John is r_____ as the best football player in the school. 86._________

　　87.No one is allowed to take the books out of the

　　library without p_________ 87._________

　　88.We can’t _____(买得起)such an expensive house. 88._________

　　89.The _____(价值)of our life is not what we get, but what we give. 89._________

　　90.G_____ speaking, much practice will do good to your spoken English.

　　90._________

　　91.Don’t get into the_____(习惯) of smoking. It is terrible. 91.__________

　　92.Give me two ______(信封). I’m sending letters to him. 92._________

　　93.It’s bad m______ to laugh at people in trouble. 93._________

　　94.I had i_______ to go with you ,but I was too busy then. 94._________

　　95.The photo he _____(冲洗)were not clear, which made Sam very angry.

　　95._________

　　Ⅵ.短文改错（共10 题，计10分）

　　(必须按照改错的要求去做。)

　　Different countries have different body language. 96__________

　　For an example, men in Russia and France kiss each other 97_________

　　when they met, but men in China or Australia shake 98__________

　　hand instead of kissing. People in Arab countries 99__________

　　like standing closely to one another when they are 100_________

　　talking, but English people must keep certain distance 101__________

　　away when they are talking . So that is important to 102__________

　　use body language in a correct way. Follow the customs 103___________

　　will help you communicate people and make your stay 104___________

　　there very easier and more comfortable. 105___________

　　Ⅶ.完成句子（共4题，计5分）．

　　106.他现在藏书达10，000册。

　　He now has _______ ________ ________ 10,000 books in his own library.

　　107.和大多数妇女相比，她确实挺幸运。

　　______ ______ most women, she was indeed very lucky.

　　108.那场雨使他未能准时到校。

　　The rain ______ him _____ coming to school on time.

　　109.我真得安下心来好好研读这本书了。

　　I really must _____ _____ _____ reading this book.

　　Ⅷ.书面表达(共1题，计10分)

　　下面四幅图说明了小刚（Xiao Gang）和他妹妹在上学路上所碰到的事。请按图意以Two Helpful Pupils 为题写一篇英语小故事。

　　要求：1．字数：80—120。

　　2．香蕉皮：banana skin

　　_________________

　　高二英语2000.11.9参考答案

　　1.A 2.C 3.B 4.D 5.A 6.B 7.C 8.D 9.A 10.C 11.C 12.A 13.C 14.D 15.C 16.A 17.B 18.C 19.D 20.B 21.B 22.A 23.C 24.C 25.C 26.D 27.B 28.C 29.B 30.D 31.D 32.D 33.B 34.A 35.A 36.B 37.B 38.B 39.B 40.A 41.C 42.B 43.A 44.C 45.D 46.B 47.D 48.D 49.A 50.D 51.B 52.B 53.A 54.A 55.A 56.D 57.C 58.D 59.A 60.A 61.B 62.D 63.D 64.A 65.D 66.B 67.C 68.D 69.B 70.C 71.B 72.D 73.C 74.B 75.A 76.D 77.C 78.A 79.B 80.A 81.D 82.B 83.B 84.C 85.A 86.recognized/regarded 87.permission 88.afford 89.value 90.Generally 91.habit 92.envelopes 93.manners 94.intended 95.developed 96.√ 97.an 98.meet 99.hands 100.close 101.a 102.that –it 103. Following 104.with 105.very—much 106.a collection of/ as many as 107.Compared with/to 108.prevented/kept/stopped…from 109.get down to

　　Writing:

　　(One possible version)

　　One day Xiao Gang and his sister were on their way to school when they saw an old woman walking in front of them, she was crying a basket full of oranges.

　　Suddenly the old woman stepped on a piece of banana skin and fell to the ground. Her basket dropped and the oranges came out of it. When Xiao Gang and his sister saw what had happened, they ran to help the old woman. Xiao Gang helped the granny to her feet while his sister picked up the oranges and put them back into the basket.

　　The old woman thanked the two children, praising them for being so kind and helpful to the old.