---Hi, Lucy．Have you heard of any good news about Frank recently?
---Yeah．She ____ have done better．She has been admitted to one of the top-ten universities in the States．

A．shouldn’t B．wouldn’t C．needn’t D．couldn’t 

D

解析考查情態(tài)動詞。couldn't + 比較級,意思為“不能再...了”,即表示最高級“非常...”或“最...”的意思，根據(jù)句意選D。

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