听力原文:M: Prof. Kennedy has been very busy this semester. As far as I know, he works unt
W: I wouldn't have troubled him so much if I had know he was so busy.
Q: What do we learn from the conversation?
(14)
A.The woman has trouble getting along with the professor.
B.The woman regrets having taken up much of the professor's time.
C.The woman knows the professor has been busy.
D.The woman knows the professor has run into trouble.