---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
网友回答
A. shouldn’t
B. wouldn’t
C. needn’t
(答案→)D. couldn’t
解析：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。