Question

【题目】Polluted air does harm to the living things on the earth. It ______ kill plants as well as even humans.

A.canB.shouldC.mustD.need

Answer 1

【答案】A

【解析】

句意：被污染的空气对地球上的生物有害。它可以杀死植物甚至人类。

考查情态动词。can可能，能够；should应该；must必须；need需要；根据“kill plants”可知是一种能力推测，可推测出此处是“能够”，故选A。