听力原文:W: Have you noticed something wrong with Mark? He's been acting very strangely la
M: Janette's parents are coming for a visit. As far as I know, this is the first time they've ever met.
Q: What does the man say about Mark?
(17)
A.Mark's thrilled that his parents are coming.
B.Mark has something that he doesn't know.
C.Mark is nervous that Janette's parents are coming.
D.Mark's going to visit Janette's parents for the first time.