(2012山东卷)30.If we _______ adequate preparations, the conference wouldn’t have been so successful.
A. haven’t made B. wouldn’t make C. didn’t make D. hadn’t made
【答案】D
【解析】考查虚拟语气。这是if引导的条件状语从句，根据主句中的wouldn’t have been so successful可知与过去事实相反，是虚拟条件句。虚拟语气中与过去事实相反的情况中，i f引导的从句中的谓语动词用过去完成时had done。句意：如果我们没有做好充分的准备，会议就 不会如此的成功。
