A、  B、  C、  B问题以疑问词when来询问Dylan先生雇用新助理的时间。(A)回答的是雇用该助理的理由，(C)回答的时刻是未来的某一时间点，与题目所问的时刻不符，因此都是错误的。

What time is the last bus to Kensington?
(A) In five minutes. You’d better hurry.
(B) An hour and a half, if you’re quick.
(C) About ten days, I imagine.

When did Mr. Dylan hire the new assistant?
(A) Because he needs help on the assignment.
(B) Last month, while you were away.
(C) After the meeting, I promise.