单选题You could have done much better yesterday. Why _____?Adidn’t youBcouldn’t youChadn’t youDshouldn’t you

单选题
You could have done much better yesterday. Why _____?
A

didn’t you

B

couldn’t you

C

hadn’t you

D

shouldn’t you

参考解析

解析：
句意：你昨天本来能做得更好，为什么没有做到呢？could have done表示本来能够，但却没有做到。如果用完整的句子是“Why didn’t you do much better yesterday?”省略后为“Why didn’t you?”故为A。

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