I wouldn have come earlier but i ___I would have come earlier but i ___that you were waiting.A.didn't know B.wouldn't knowC.hadn't known D.haven't known选择哪个?为什么?

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I wouldn have come earlier but i ___I would have come earlier but i ___that you were waiting.A.didn't know B.wouldn't knowC.hadn't known D.haven't known选择哪个?为什么?
I wouldn have come earlier but i ___
I would have come earlier but i ___that you were waiting.
A.didn't know B.wouldn't know
C.hadn't known D.haven't known
选择哪个?为什么?

I wouldn have come earlier but i ___I would have come earlier but i ___that you were waiting.A.didn't know B.wouldn't knowC.hadn't known D.haven't known选择哪个?为什么?
你先从正面的句子想
I would have come earlier if i knew that you were waiting
knew 的反义 就是 didn't know
I would have come earlier but i (didn't know) that you were waiting.

首先要排除D,不是持续到现在的
排除C,没有过去的过去做比较
剩下AB,选A

A

a

D 翻译是 我本来能够早来一会儿的,不过我不知大你在等。强调当时当时动作对现在的影响。