A、Swimming and jogging. B、Jogging and weight-lifting. C、Weight-lifting and swimming. D、Jogging only. C事实细节题。男士说他每天早上花半个小时举重，并且每隔

W: John, you look terrific. Are you working out recently? You surely are in good shape.
M: Yes. I’m glad you can see the change. It seems that my hard work paid off.
W: Tell me your secret. How can you make such a big difference within such a short time?
M: I don’t think I have any secrets. I just keep on exercising.
W: How often do you do exercises and what kind of exercises do you usually do?
M: Well,(19)I usually spend half an hour weight-lifting every morning. And I go swimming every other day in the evening after work.
W: Oh, I am not a morning person. Every morning, I open my eyes, grab some bread and then go to catch the bus.
M: I don’t think that’s a good habit. I remember you do jogging a lot.
W: Oh, yes. I cover at least five miles every day, so I go out running immediately after dinner in order not to miss my favorite TV show.
M: (20)Do you often run when you are full?
W: Yes. Any problem with that?
M: (20)I don’t think it is a good idea. It might be harmful.
W: Your words seem to ring a bell. I kind of remember having read something about that. Maybe I should make some changes. Do you have any suggestions?
M: (21)Well, I am not an expert, but I have a friend who is an excellent fitness instructor. Would you like to meet him some day and get some advice from him?
W: That would be nice.
19. What kind of exercises does the man take?
20. What’s the bad habit the woman has according to the man?
21. What advice does the man offer to the woman?