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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
参考答案
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。
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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