A、  B、  C、  B题干问的是“来访的目的是什么”，要从语义上寻找正确答案。(A)可以用来回答访问期限；如果问的是什么时候来的，则可以用(C)来作答。正确答案是(B)“来见朋友”。

Where can I park my car?
(A)No, I took the bus.
(B)Parking costs five dollars per hour.
(C)There’s a parking lot on the next block.

What is the purpose of your visit?
(A)For 10 days
(B)To meet a friend
(C)Last year in October