阅读理解。 There are 45 students in our class. I have made a survey, 36 students say they like to exercise. Most boys play basketball together twice a week. But girls think basketball is difficult for them, they'd like to play volleyball together twice a week. My friend, Tony, is good at running. He runs fastest (最快) in our class. He runs for 30 minutes on the playground every evening before he goes to bed. Is it interesting? Gray is good at swimming. He goes to the swimming club three times a month in winter, and three times a week in summer. So he is pretty healthy. Some of my classmates have good eating habits. They eat both meat and vegetables. 70% of them drink milk every day. 15 students say they drink milk three or four times a week. But some students like to eat junk food, especially Sally. What's worse (更糟糕的) is that she doesn't like to exercise, so she is very fat. She always says ' I'm going to lose weight (减肥) tomorrow.' 1. How often do most boys play basketball? [     ] A. Every day. B. Twice a day. C. Twice a week. D. Twice a month. 2. Why do the girls dislike to play basketball? [     ] A. Because they have no time. B. Because they think it is not easy. C. Because they don't like to play with the boys. D. Because they don't like to exercise. 3. When does Tony often run for 30 minutes? [     ] A. Every morning. B. Every afternoon. C. Every evening before he goes to bed. D. Every evening before supper. 4. How often does Gray swim in winter? [     ] A. Three times a month. B. Three times a week. C. It isn't mentioned in the passage. D. Hardly ever. 5. Why is Sally so fat? [     ] A. Because she doesn't like to exercise. B. Because she likes to eat junk food very much. C. Because she eats too much meat, but doesn't exercise. D. Because she doesn't like to exercise, and she likes to eat junk food.