--Excuse me, whose Japanese book is this

问题选择题

--Excuse me, whose Japanese book is this?

--It be Tom ' s. In our class, only he is studying Japanese.

A. must B. can't C. would

答案

答案：A

考查情态动词的用法。根据“only he is studying Japanese”可知这本日语本肯定是他的。must“一定”。