题目内容
-Hi, Sam! You are late.
-Sorry, I would have come sooner, but I ________ that your were waiting.
[ ]
A.didn't know
B.don't know
C.hadn't known
D.haven't known
答案:A
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题目内容
-Hi, Sam! You are late.
-Sorry, I would have come sooner, but I ________ that your were waiting.
[ ]