A、A couple of days. B、Four years. C、Six months. D、Two weeks. A由男士回答的“Just a couple of days”可知，他得了肺炎后待在家几天。故选A。

M: Dr. Brook, I always feel tired and rundown. My wife finally persuaded me to visit you.
W: Looking at your case history I see that you had pneumonia four years ago and that you also had a minor operation last year. Did you have any long aftereffects?
M: Well, I don’ t remember so…
W: For instance, how long did you stay at home each time?
M: Just a couple of days. But about six months ago I was home for about two weeks with a cold or something.
W: Did you see a doctor?
M: No. The symptoms were about the same as this time. When I began to feel better, I returned to work.
Q13: Why is the patient seeing the doctor?
Q14: How long did the man stay home after he had pneumonia’’
Q15: When did the man return to work the last time he was sick?