◎ 题干
Everyone _____ fight against pollution.
[     ]
A. may
B. should
C. mustn't
D. needn't
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Everyone _____ fight against pollution.[ ]A. may B. should C. mustn't D. needn't…”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。