A、  B、  C、  B题目为询问谁来进行培训的Who疑问句。

Didn’t we extend the deadline until Friday?
(A) We’re expanding the company.
(B) No, it’s Thursday.
(C) We’d better set a deadline.

Who is conducting the training?
(A) He took the train.
(B) It hasn’t been decided yet.
(C) He’s a good conductor.