Question

【题目】—Is Wilson on duty in class today?

—It________be him. It's his turn tomorrow.

A.mustB.can'tC.shouldD.needn't

Answer 1

【答案】B

【解析】

句意：——威尔逊今天上课值日吗？——一定不是他。明天轮到他了。

考查情态动词。must必须；can't不是，不会；should应该；needn't不必。根据It's his turn tomorrow.可推测“It________be him.”表示的是“一定不是他”。B项意思合适。故选B。