A、  B、  C、  B(A)主语不一致。(B)问题是询问不申请维修部的原因，回答不感兴趣，故为正确答案。(C)使用与问题中的maintenance有关的词repair，设置陷阱。

Could you give me a hand for a minute?
(A)I’ll hand it in right away.
(B)Sure, I can give you a ride.
(C)I’d be glad to.

Why didn’t you apply for the job in maintenance?
(A)He’s a full-time employee.
(B)It didn’t sound very interesting.
(C)I repaired it myself.