A、  B、  C、  C使用can的yes／no疑问句→反问得到信息的方法的回答

Should I give you my home or office number?
(A)  Whatever I can reach you at.
(B)  I like working at my office.
(C)  Yes, give me your phone number.

Can you tell me your cell phone’ s serial number?
(A)  I couldn’ t contact him the other day.
(B)  Yes, he’ s serious.
(C)  Where can I find it?