we start()work

Question

We won’t start the work until all the preparations __________．（　　）

A. are being made

B. will be made

C. have been made

D. had been made

Answer 1

答案C．
are being 是现在进行时的被动形式；will be made 是一般将来时的被动形式；have been made是现在完成时的被动形式，用于强调动作产生的影响；had been made是过去完成时的被动形式．本题是主将从现的用法．主句是将来时时，从句用现在时或相当于现在的时态；现在完成时强调过去对现在的影响或动作从过去一直持续到现在．所以选C．