单选题
You will hear three dialogues or monologues. Before listening to each one, you will have time to read the questions related to it. While listening, answer each question by choosing A, B, C or D. After listening, you will have time to read your answers. You will hear each piece once only.

Questions 11-13 are based on the following talk. You now have 15 seconds to read Questions 11-13.

【正确答案】 D

【答案解析】[听力原文] 11-13 W: Exercise, exercise, exercise. We hear so much about it these days, yet even the experts can't agree on which exercises are best. Now some doctors are strongly encouraging arm exercises. M: Arm exercises? Is that because our arms are too fat or flabby? W: Actually, that's not the main reason. They say that arm exercises are an ideal way to become physically fit. M: But don't arm exercises raise your blood pressure? W: That they do. But the article I read mentioned ways to compensate for that. M: How? W: By adding leg exercises, so the arms don't do all the work. Arm exercises alone aren't enough to increase metabolism before fatigue sets in it. The more of the body that's involved in the exercises, the better. M: And in turn, I'm sure that there's a great chance of losing weight. W: Sounds right to me. M: So what exercises do the experts recommend? W: They mentioned quite a few, but some of the more popular ones are cycling with special bicycles that make you use both your arms and legs. And walking vigorously while you wear arm weights. M: I must try that. I like to walk a lot.