---Have you heard of Wang Meng?
---Yeah, she have done better. She won China’s first gold medal at Turin.
A. should
B. might
C. needn’t
D. couldn’t
网友回答
A. should
B. might
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。