A、  B、  C、  C问题以“Didn’t you say…?”的形式，问对方是不是说过要从某项工作中退出。(C)回答说虽然说过，但现在又改变了想法，因此是正确答案。(A)中出现了与题中的quit意思相反的join，(B)

Should we complain to the manager?
(A) No, let’s just wait for a bit.
(B) He’ll manage it very soon.
(C) We should certainly find it out.

Didn’t you say you were quitting?
(A) Of course, I’ll join soon.
(B) I’ll say it later, after I talk to Bob.
(C) I did, but I changed my mind.