A、  B、  C、  B询问预定时间的when疑问句→没有提及时间的间接回答

Don’t we need to leave for the airport soon?
(A)  Yes, right after I make one call.
(B)  Yes, the airport is close to here.
(C)  Yes, we still have plenty of time.

When could you order these supplies?
(A)  That company supplies our paper.
(B)  I have to get permission first.
(C)  The shipment will be on schedule.