I would have e earlier, but I that you were waiting for me.
A. didn’t know
B. hadn’t known
C. haven’t known
D. wouldn’t have known
网友回答
(答案→)A. didn’t know
B. hadn’t known
C. haven’t known
D. wouldn’t have known
解析：考查时态。句意：我本可以早点来，但是我不知道你在等我。根据句意，我是过去不知道你在等我，所以用一般过去时态。选A。