74. The Polar Bears like to swim all the year round,for　　　　　　　　　 .

A. they can remain young

B. it is an easy way to keep the body warm in winter

C. they find it enjoyable and interesting

D. they might meet fewer troubles in life

73. According to the passage, some doctors believe it is true that　　　　　　　　　 .

A. you are healthy if cold-water swimming turns your skin color blue

B. cold-water swimming causes more heart attacks in summer than in winter

C. cold-water swimming can make the body temperature dangerously high

D. Polar Bears are bears swimming in freezing water

72. Doctors　　　　　　　　　　　　 .

A. encourage people to take part in cold-water swimming actively

B. point out the possible danger of blood illness during cold-water swimming

C. believe swimming is helpful both in winter and in summer

D. have different ideas about the medical effects of cold-water swimming

71. The members of the Polar Bear Club must meet the following requirements except that　　　　　　　　　 .

A. they should be easy to make friends with

B. they must swim outdoors at least 8 times in the four cold months

C. they must agree to swim outdoors from November through February

D. they must reach the age of 60

70. After experiencing the American school life,Mike thought　　　　　　　

A.a better education should include something good from both America and Germany

B.German schools trained students to be better citizens

C.American schools were not as good as German schools

D. the easy life in the American school was more helpful to students

(B)

When did you last see a polar bear(北极熊)?On a trip to a zoo, perhaps?If you had attended a winter activity in New York a few years ago, you would have seen a whole polar bear club. These "Polar Bears" are people who meet frequently in the winter to swim in freezing cold water.That day, the air temperature was 3℃, and the water temperature was a bit higher. The members of the Polar Bear Club at Coney Island, New York are usually about the age of 60. Members must satisfy two requirements. First, they must get along well with everyone else in the group, this is very important because there are so many different kinds of people in the club. Polar Bears must also agree to swim outdoors at least twice a month from November through February.

Doctors do not agree about the medical effects of cold-water swimming. Some are worried about the dangers of a condition in which the body's temperature drops so low that finally the heart stops. Other doctors, however, point out that there is more danger of a heart attack during summer swimming because the difference between the air temperature and water temperature is much greater in summer than in winter.

The Polar Bears themselves are satisfied with the benefits (or advantages)of cold-water swimming. They say that their favorite form of exercise is very good for the circulatory system(循环系统)because it forces the blood to move fast to keep the body warm. Cold-water swimmers usually turn bright red after a few minutes in the water. A person who turns blue probably has a very poor circulatory system and should not try cold-water swimming.　

The main benefits(or advantages)of cold-water swimming are probably mental. The Polar Bears love to swim year-round;they find it fun and relaxing. As one 70-year-old woman says. "When I go into the water, I pour my troubles into the ocean and let them float away."

69. What is particular in American schools is that　　　　 .

A. there is some middle ground between the two teaching buildings

B. there are a lot of after-school activities

C. students usually take fourteen subjects in all

D. students go outside to enjoy themselves in a car

68. Fred and Mike　 agreed that　　　　　 .

A. American food tasted better than German food

B. German schools were harder than American schools

C. Americans and Germans were both friendly

D. There were more cars on the streets in America

67. The whole exchange programme is mainly to　　　　　　 .

A. help teen-agers in other countries know the real America.

B. send students in America to travel in Germany

C. let students learn something about other countries

D. have teen-agers learn new languages

(A)

This year some twenty-three hundred teen-agers(young people aged from 13-19)from all over the world will spend about ten months in U. S. homes. They will attend U. S. schools, meet U. S.teen-agers, and form impressions of the real America. At the same time, about thirteen hundred American teen-agers will go to other countries to learn new languages and gain a new understanding of the rest of the world.

Here is a two-way student exchange(交换)in action. Fred, nineteen, spent last year in Germany with George's family. In turn,George's son Mike spent a year in Fred's home in America.

Fred, a lively young man, knew little German when he arrived, but after two months'study, the language began to come to him. School was completely different from what he had expected-much harder. Students rose respectfully when the teacher entered the room. They took fourteen subjects instead of the six that are usual in the United States. There were almost no outside activities(活动).

Family life, too, was different. The father's word was law, and all activities were around the family rather than the individual(个人). Fred found the food too simple at first. Also, he missed having a car.

"Back home, you pick up some friends in a car and go out and have a good time. In Germany, you walk, but you soon learn to like it."

At the same time, in America, Mike, a friendly German boy, was also forming his idea. "I suppose I should criticize(批评)American schools", he says. "It is far too easy by our level. But I have to say that I like it very much. In Germany we do nothing but study. Here we take part in many outside activities. I think that maybe you schools are better in training for citizens(公民). There ought to be some middle ground between the two. "

66. This year　　　　　 teen-agers will take part in the exchange programme between America and other countries.

A. twenty three hundred　　 B. thirteen hundred

C. over three thousand　　 D. less than two thousand

65. Her gift for computer is the envy of many people.

A. She wishes she could get a computer as a present like many people.

B. Many people envy her because she got a computer as a present.

C. Many people wish they were as good at the computer as she is.

D. She hopes to be good at the computer so that many people will envy her.