Question

【题目】It ________ be John's. It's too big for him.

A. could B. might C. mustn't D. can't

Answer 1

【答案】D

【解析】

句意：它一定不是约翰的，对于他来说太大了。A. could能；B. might可能； C. mustn't 禁止；D. can't不能，表示有把握的否定推测；根据下文It's too big for him.可知上文是有把握的否定回答。could和might表示没把握的肯定推测。根据题意，故选D。