问题
选择题
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
答案：D
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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