【题目】
A.In a professor's office.B.In a second-hand book shop.
C.In a library.D.In a hospital.
在线课程【答案】C
【解析】
【原文】
W: Excuse me, Sir, can I borrow these books on medicine?
M: Sorry, you are only allowed to have three at a time.
Q: Where does the conversation most probably take place?