用恰当的词语填空。完成对话。每空一词。 D = doctor P = patient D: What's the matter with 1_________, young man? P: I cough day and night. I can't sleep well. D: Let me see. Open your 2_________and say 'Ah'. P: Is there anything wrong with my throat? D: No, 3_________serious. Do you smoke? P: Yes, These days I am smoking a lot. D: Don't smoke too much. It may 4_________ cancer. P: I see. I'll try to give up smoking. D: Well, take this medicine three 5_________a day and have a good rest. You'll be all right soon. P: Thank you very much. D: You're welcome.