______ young man over there is ______ university student.

　　　　　　　　　　　　　　　　　　　　　　　　 [　　]

　　 A. The…a　　　B. A…a　　　C. A…an　　　D. The…an

用所给词的适当形式完成下列短文
Christmas was coming. A lot of    1  were going to town. They hoped to   2   some vegetables, fruit and meat in the market. And then they were going to buy some   3   for their families. A bus came. They tried to   4  . Robert, a strong young man, rushed in first. He occupied(占)two  5  :　one for his girl friend Mable and the other for himself.
　　The bus started. Robert had a look   6   the bus. He saw a lot of people   7    there. There were some old men among them. He hurried to     8   his eyes. Mable found it and thought he felt   9   and asked, “What’s wrong with you, dear?”“  10  ,”answered the kind-hearted (好心肠) young man. “I can’t bear (忍心) to see the poor old men!”

 One Friday night, a poor young man stood at the train station. He played his violin and many people put 41  into the hat in front of him.　　

The next day, the young man came to the station 42  . But this time he took out a large piece of paper 43 some words on it. It said “Last night a lady 44  Mrs Sang put an important thing into my hat 45  . Please come for it.”　　

After about an hour, a middle-aged woman ran to the young man in a hurry and said, “You do come here. I know that you’re a(n) 46  man and will certainly come here.” They had a talk and the young man made sure she was the owner. Then he took out a lottery ticket and 47  it to the woman. Her husband bought a lottery ticket every day. Yesterday when she knew the lottery ticket he bought won, she was very 48  . The prize of the lottery ticket was $ 500,000. When she walked past the young man, she took out $50 and put it in the hat. 49  , the lottery ticket was also thrown in.　　

Later, someone asked the young man, “You play the violin every day to make money. Why didn’t you just take the prize of the lottery ticket for yourself?” the young man said，“Although I don’t have much money, I live happily. But if I 50  honesty, I won’t be happy forever.”　　

1. A. money       B. tickets          C. paper　　

2. A. instead       B. differently      C. again　　

3. A. for          B. with           C. over　　

4. A. introduced     B. spelled         C. named　　

5. A. by mistake     B. for mistake      C. on mistake　　

6. A. crazy         B. cool        C. honest　　

7. A. gave          B. lent            C. offered　　

8. A. surprising       B. happy         C. exciting　　

9. A. But            B. However      C. Therefore　　

10. A. have            B. win             C. lose　　

The human body is a living machine, and, like all machines, it needs “fuel” to supply it with energy. This is provided by the food we eat. But how much do we need to stay healthy?

The energy value of food is usually measured in calories(卡). A calorie is the amount of heat required to raise the temperature of 1 kg of water by 1℃. The number of calories people need per day is different, as the picture shows. Also, the number of calories you use at any one moment normally depends on the activity you are in. For example, you need more calories for standing than for sitting, more for running than for walking, and so on.

The energy in food is in the form of three kinds of chemical materials—carbohydrate（碳水化合物）, protein（蛋白质） and fat. Carbohydrate provides 3.8 Cal /gm of the energy, protein 4.0 Cal/gm, and fat 8.8 Cal/gm. Each food contains different amounts of these materials, as the round pictures show.

(P= protein      C= carbohydrate    F=fat)

1.How many calories are needed to raise the temperature of 5kg of water from 35℃ to 90℃?

2.Which of the following contains the most amount of calories?

3.Who needs the most amount of calories each day?

4.Which of following is True?　　

5.This passage mainly tells us ______.