问题补充:
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:
A. haven’t made
B. wouldn’t make
C. didn’t make
(答案→)D. hadn’t made
解析:考查虚拟,由后面的句子the conference wouldn’t have been so successful.所以是对过去的一种虚拟,所以选D,句子意思“如果我们没有做好充分准备,这次会议就不会如此成功”