【正确答案】 C

【答案解析】[听力原文]
   M: OK, we got the results of your EKG and blood and urine tests. All appear to be normal. How are you feeling after the medication I prescribed?
   W: Well, the dizziness is gone, but I'm still having the headaches and backaches. Are you sure everything is normal?
   M: As far as these tests are concerned, there's nothing wrong with you, but perhaps we should do further tests to see if your headaches aren't related to something else. I'll order PET and CT scans for next week so we can rule out anything more serious.
   W: Now I'm even more worried. Are you sure these scans are necessary?
选项A错误，对话涉及一些健康症状，不太可能发生在教授和学生之间。选项B错误，这不太可能是老板与秘书的对话。选项C正确，对话中提到血检结果和用药，可以推断这是医生和病人间的对话。选项D错误，对话中未提到关于修理的事。