题目内容

Everyone in this country should work hard and do what they can _____ against national smog.
A．fight B．foughtC．fightingD．to fight
D

试题分析：句意：这个国家的每个人都应该努力工作尽最大的能力来对抗全国范围的大雾。这里do后面是宾语从句what they can，惨后面省略了do，后面是不定式做目的状语，所以选D。
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