听力原文：W: Exercise, exercise, exercise! We hear so much about it these days, yet even ex

perts 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 and 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 overcome that.

M: How？

W: By adding leg exercises, so the arms don't do all the work. The mare of the body that is involved in the exercises, the better.

M: And in mm, I am sure, there's a greater chance of losing weight.

W: Sounds tight to me.

M: So what exercises do the experts mend？

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 are moving your arms.

M: I must try that. I'd like to walk a lot.

(20)

A．They can raise one's blood pressure.

B．They are not acceptable to most people.

C．They can cause heart attack.

D．They can damage arm muscles.