Had I known the party was so boring, I wouldn’t have e. I anything.
A. hadn’t done
B. haven’t done
C. didn’t do
D. wouldn’t do
网友回答
A. hadn’t done
B. haven’t done
(答案→)C. didn’t do
D. wouldn’t do
解析：考察时态。本题的关键是对前半句的理解。句意：如果我知道这个聚会很无聊，我就不会来了。根据句意说明是对过去情况的说明。故后面使用一般过去时。故C正确。