听力原文:W: I thought the librarian said we could check out as many books as we need without oar library cards. M: That's right, but not those reference books. Q: What does the man mean? (13)
A.
Students with a library card can check any book out.
B.
Reference books are not allowed to be checked out.
C.
Only students with a library card can check out reference books.
D.
The number of books a student can check out it unlimited.