B

　　When did you last see a polar bear？ 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 at 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 don‘t 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 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.

　　The main benefits 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.”

　　(    ) 26. The members of the Polar Bear Club must meet the following requirements except that ________.

　　A. they must reach the age of 60

　　B. they should be easy to make friends with

　　C. they must swim outdoors from November through February

　　D. they must swim outdoors at least twice a month in the four cold months

　　(    ) 27. Doctors ________.

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

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

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

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

　　(    ) 28. The Polar Bears like to swim all year round， for ________.

　　A. they can stay young

　　B. they find it enjoyable and interesting

　　C. they might meet fewer troubles in life

　　D. they can keep warm in winter easily

　　(    ) 29. The passage is mainly about ________.

　　A. the Polar Bears‘ life in New York

　　B. the requirements of the Polar Bear Club

　　C. a group of cold-water swimming lovers

　　D. doctors’ ideas about cold-water swimming

　　(    ) 30. What does the underlined word “benefits” mean？

　　A. 缺点    B. 优点    C. 好处    D. 积极