【答案解析】[听力原文]
M: Hi, Cathy. Haven"t seen you for ages? Do you go to work on foot every day instead of driving your own car?
W: Yes, I want to lose weight.
M: Then why don"t you try to eat more fruits?
W: I"ve tried a fruit diet to reduce my weight, but the doctor says more exercise is better.
M: Good luck.