A、Healthy food. B、How to do exercise. C、How to keep fit. D、Effective medicine. C主旨题。对话开始女士便提到她很胖，食物和运动等相关信息都是针对女士的肥胖问题提出的解决方法。说话

W: Good morning, Dr. Smith. I’m not sure whether you can help me or not, but I’m getting desperate!
M: Oh, what’s wrong? What is making you so desperate?
W: Well, everybody laughs at me because I’m so fat I’ve always been overweight I’m trying to eat less but I don’t seem to be able to lose any weight. I don’t know what I can do. Maybe you can give me some medication?
M: Well, it is not a good idea to eat less. You should eat more healthy food like fruits and vegetables, and avoid fast foods like the hamburgers and hot dogs.
W: But hamburgers and hot dogs are my favorite.
M: That’s the problem. They contain high calorie that causes fatness. In addition to avoiding these high calorie foods, you should do some exercises. Physical exercise does a lot of good to health and will be an effective way to reduce weight. Medicine is not always the best solution to your problem.
W: I know, but I don’t have time to do exercise. You know, I’m busy at my work from morning to night. Besides, I am not rich enough to go to the gym.
M: You needn’t spend much time on exercise and you don’t have to go to the gym. I suggest that you walk more regularly. You could get off the bus one stop early and walk the last bit. When you walk, try to walk a little more quickly. You could also use the stairs instead of the elevator.
W: That’s really a good idea.
M: You will succeed, if you act in accordance with my suggestions.
13. What are they talking about?
14. Why does the woman feel desperate?
15. What is not the man’s suggestion?