A、Two weeks. B、Two days. C、A few years. D、Several days. C本题考查时间。男士描述病情时说到这次头疼是两周之前开始的，但是头疼的问题是几年前就有的，只是没有这次严重。

W: What’s the matter with you, sir?
M: I have a terrible headache.
W: When did it begin?
M: About two weeks ago.
W: Have you ever had this kind of headache before?
M: I’ve had headaches for several years, but not as bad as this.
W: How old are you?
M: I’m 61, just retired from my job.
W: Have you seen doctors about this before? What did they say?
M: Two years ago I went to see a doctor, and he told me I had slight hypertension.
W: So what kind of treatment have you taken in the past?
M: I took some medicine for hypertension occasionally.
W: Let me take your blood pressure.
M: OK.
W: It’s 110 over 170. That’s a little high.
M: Is it serious?
W: You should have a good rest, avoid nervous tension or stress and give up smoking and alcohol.
M: All right. Should I take some medicine?
W: Yes. I will prescribe you some and you should take blood pressure at home on schedule.
M: I will. Thank you.
Questions 16-20 are based on the passage you have just heard:
16. How long has the man had the problem?
17. What did the man do about it before he saw this doctor?
18. What problems does the man probably have?
19. What is NOT the advice given by the doctor?
20. What is the man supposed to do?