—TheboybetweenMrGreenandMrsGreenislovely.IshetheirsonTo...

问题详情：

—The boy between Mr Green and Mrs Green is lovely. Is he their son Tom?

         —It ______ be him. I’m not sure.

A. must          B. mustn’t       C. may            D. can’t

【回答】

C

知识点：情态动词

题型：选择题