I you, but I was busy all the time yesterday afternoon.A. could helpB. had helped C. help

发布时间：2020-08-16 19:55:55

I      you, but I was busy all the time yesterday afternoon.
A. could help
B. had helped
C. helped
D. could have helped

网友回答

A. could help
B. had helped
C. helped
(答案→)D. could have helped
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