Question

【题目】–Why ______ we close that chemical factory?

–Because it has caused lots of pollution. We need better environment.

A. must

B. can

C. may

Answer 1

【答案】A

【解析】句意：——我们为什么一定要关闭化工厂？——因为它造成了很多污染。我们需要更好的环境。考查情态动词辨析题。must必须，强调主观意愿；can能，表允许或有能力；may可以，表允许。本句是进行强调，根据句意语境，可知选A。