Question

they are too tall for him什么意思

The shoes John's，they are too small for him．（　　）

A. could be

B. can't be

C. mustn't be

Answer 1

答案：B．could be可能是；can't be不可能是；mustn't be一定不是；根据they are too small for him，可知对他来说这双鞋太小了，所以不可能是约翰的，mustn't一般表示明令禁止做某事，而can't be不可能是．故选B．