. - The speaker is a tall man with glasses.
- Then it be Mr. Smith, who is short and thin.
A. wouldn't
B. won't
C. mustn't
D. can't
网友回答
A. wouldn't
B. won't
C. mustn't
(答案→)D. can't
解析：句意：上文，这个说话的人是一个戴着眼镜的高个子男子。下文，那不可能是史密斯先生，史密斯先生又矮又瘦。表示推测，用can't，选D。