问题
选择题
---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
答案
答案：D
考查情态动词。couldn’t + 比较级,意思为“不能再...了”,即表示最高级“非常...”或“最...”的意思，根据句意选D。