Dear Benny,

I’m very sorry I don’t have much time to write to you often. I am always b 　　　 at school. I usually

s__ 　　　 two hours a day playing football. Football is my favorite . It’s important to k _______

healthy.

Next week, I’m coming to Nanjing with my p 　　　　 . I will stay there with them for 2 weeks, I’m very excited, because it will be my first t 　　　　 to be in China. I really want to learn some C_______ though(虽然) I hear it is d 　　 for a foreigner(外国人) to learn it well. I a _ want to see old buildings and

e traditional food in China. Will you tell me some interesting p________to visit? I am looking forward to your letter.

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 ______.

— Excuse me. Is the library open all day?

— 　　　 . Only from 8 a.m. to 4 p.m..

　　 A. Yes, of course　 B. That's right　 C. Sorry, I'm not sure　 D. Sorry, I'm afraid not