Question

--Have you seen Jack? His mother is looking for him all the afternoon.

--No, I haven’t. I am sure his mother________be very worried.

A. must B. may

C. need D. should

 

Answer 1

A

【解析】

试题分析：句意：--你看到杰克了吗？他的母亲一下午都在找他。--不，我没有。我确信他的母亲一定非常担心。分析：考查情态动词的用法，表示肯定的猜测用情态动词must.故选 A

考点：考查情态动词的用法。