听力原文:M: Excuse me, Miss. I'm a graduate student of mathematics. I've just me from Japa
W: I'd be glad to show you around, but I'm very busy right now. Could you come hack about 4:00?
Q: What is the student concerned about?
(18)
A.Making an appointment.
B.How to use the library.
C.Coming back about 4:00.
D.How to choose a course.