【题目】—Is the doctor your son？Has he graduated from university?
—Yes，he in Nanjing Medical University for 5 years.
A. has been studying B. studies
C. had studied D. studied
在线课程【答案】D
【解析】句意：——这个医生是你儿子吗？他已经大学毕业了吗？——是的，他在南京医科大学学了五年医。根据回答yes可知，在南京医科大学学医是过去的事情，故用一般过去时，故选D项。