A、  B、  C、  B题干中说如果我们再不出发，队会很长，(B)项“好的，我准备马上出发”符合题意，是正确选项。(A)项中的went是题干中的go的过去式，容易干扰考生的判断，这个选项可以用来回答询问出发时间(when)的

Could I get this suit in blue instead of black?
(A) Actually, that’s the front.
(B) Let me check if we have more.
(C) I think it suits you just fine.

The line will be long if we don’t go soon.
(A) I went yesterday.
(B) O.K., I’m almost ready to go.
(C) I haven’t had a chance to measure it.