阅读下面的短文，在标有序号的空白处填入一个适当的词或用括号中词的适当形式填空。

The skin is  1.    essential part of your body and its largest organ. You have three

 l 2.   of skin which act as a barrier　3.　disease , poisons and the sun’s harmful rays. The functions of your skin are also very 4.　: it keeps you warm or cool; it5.　your body from losing too much water; it is __6.__ you feel cold , heat or pain and it gives you your 7.　of touch. So as you can imagine, if your skin gets _8.__  it can be very serious. First aid is a very important 9.　step in the treatment of burns . You can get burned by a variety of things. There are three types of burns, 10. (depend) on which layers of the skin are burned.

 

I don't know how it is that when I go to a post office I always seem to find myself in a line behind someone who has some long and complicated business to do. Having only come in to buy a couple of stamps, I am obliged to wait patiently while an old lady takes ten minutes to complete a form that a child could do in one. People in other lines move quickly forward to take their turns and are served by cheerful clerks. Sometimes, feeling that I cannot bear waiting in my motionless line any longer, I decide to join another one. It may be longer, but at least it is moving. This always turns out to be the worst thing I could have done. Not only have I now lost my place in the first line but the one I am in now slows to a stop. An angry argument suddenly develops between the clerk and the customer at the counter, or information is asked for which results in the clerk having to ask a senior official or, if it's a particularly difficult problem, disappear into a back room. Why it takes him so long, I don't know. Perhaps he has a quick snack, but, no, that can't be right because when at last my turn comes, he pushes forward a printed sign, saying "Position Closed" and without a smile says, "Sorry, going to lunch"

31. When the writer goes to the post office

　　 A. he always has a lot of business to do　 B. he always has to fill in a form

　　 C. he only buys stamps　　　　　　　　　　 D. he has to try to be patient

32. Why does the writer sometimes decide to join a line at another counter?

　　 A. There aren't so many people waiting there.　　 B. The clerk is more cheerful.

C. The people are moving.　　　　 D. The clerk is not so busy.

33. What usually happens after the writer has joined another line?

A. It gradually stops　　　　　　　　　 B. It stops suddenly

C.　 It keeps stopping　　　　　　　　　 D. It doesn't stop

34. Why does the writer think the clerk goes into a back room?

A. To have his lunch　　 　　　　　　　　B. To get some information

C. To have a rest　　　　　　　　　　　 D. To talk to someone

35. What happened when it is the writer's turn to be served?

A. The clerk tells him to go away　　　 B. The clerk goes off duty

C. The clerk gives him a sign　　　　　　　 D. The clerk offers him a position

　　　　　　　　　　　　　　

阅读理解

　　Solid proof is rising that drinking tea can prevent cell damage that leads to cancer, heart disease and perhaps other ills, scientists said on Tuesday.

　　It may soon be time to add tea to the list of fruits and vegetables that experts advise Americans to eat as often as possible to reduce their risk of disease, the researchers told a meeting hosted by the U. S. Department of Agriculture, the Teas Council, the American Cancer Society and other groups.

　　“In some respects, it is good to think of it as a plant food,” Jeffrey Blumberg, a nutritionist(营养学家)at Tufts University in Boston, told a news conference.

　　Blumberg said tea is full of phytochemicals(植物化学)－a wide range of molecules that can act as antioxidants(防老化剂). Such compounds work against the damage done to DNA cells by free radicals (原子团)produced by sunlight, chemicals, many foods and simply the stress of day－to－day living.

　　Damaged DNA is the first step to cancer, and is also related to heart disease.

　　Vitamins such as A and C are antioxidants, but so are compounds such as the catechins(儿茶酚)found in tea.

　　“It's taken about 30 years to fully appreciate the importance of these compounds,” Blumberg, who acts as an adviser to both the U. S. Food and Drug Administration and the Tea Council, said.

　　The USDA reported on a study suggesting that tea － drinking can also reduce the risk of heart disease by lowering cholesterol(胆固醇).

1．Why may tea reduce risk of cancer and heart disease according to this passage?

[　　]

A．Because tea is very popular with the world

B．Because tea is a kind of plant food

C．Because tea contains Vitamin A and Vitamin C as well as the catechins

D．Because tea contains healthy DNA cells

2．The main purpose of this article is ________.

[　　]

A．to advise people to drink tea

B. to advise people to buy tea

C．to tell people to sell tea to make a fortune

D．to advise people to plant more tea

3．Which of the following agrees with the content of the passage?

[　　]

A．Drinking tea can kill the damaged DNA cells

B．If a person keeps drinking tea, he or she will never suffer heart disease

C．Scientists didn't understand the importance of antioxidants until 30 years ago

D．Antioxidants can prevent DNA cells from being damaged