【题目】I would have come earlier, but I ________ that you were waiting for me.
A.didn't know
B.hadn't known
C.would have known
D.haven' t known

【答案】A
【解析】考查时态。从前面的would have come earlier“我本来可以来得更早”，说明过去没能早来，是因为过去不知道你在等我，用过去时。故选A。