A: Hello, Mr. Black!B: Hello, Dr. Johnson!
A: What seems to be the problem?
B:56 B
A: Isee. 57 A
B: For a couple of days.
A:58F
B: No.But the cough just doesn't go away. Can you give me any suggestions?
A:59C
B: What do you think might be the cause of my cough?
A: I think you'd better have an X-ray examination first 60
B: Thanks a lot.
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