If we a full preparation, the meeting wouldn't have been so successful．
A. haven't made
B. wouldn't make
C. didn't make
D. hadn’t made
网友回答
A. haven't made
B. wouldn't make
C. didn't make
D. hadn’t made
解析：考查虚拟语气：句意：如果我没有充分准备，会议就不会这么成功。动作是和过去相反，if条件句用过去完成时，主句是wouldn’t have done。选D。