----Whose is that book?----It ________

试题详情及答案解析

----Whose is that book?
----It _________ belong to Lucy. Her name is on it.

A．must

B．mustn't

C．might

D．can't

答案：A

试题分析：句意：-这本书是谁的？-它一定属于露西。上面有她的名字。Must必须，一定； mustn't禁止，不允许；might可能；can't不可能。根据Her name is on it.可知该选A。
考点：考查情态动词。