填空题 Wang Ping: You are not looking well, David. (56) ?
David: I'm afraid that (57)
Wang Ping: You ought to take some medicine and go back to bed, I think.
David: Thank you, Mr. Wang. But (58) ?
Wang Ping: Of course. How are you going back?
David: By bus.
Wang Ping: (59)
David: It's very kind of you. (60) ? I want to buy some medicine.
Wang Ping: No problem.