◎ 题干
—Oil is everywhere in this store, so you _______ know smoking is forbidden here.
—I'm sorry.
[     ]
A. can
B. may
C. must
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Oil is everywhere in this store, so you_______ know smoking is forbidden here.—I'm sorry. [ ]A. can B. mayC. must …”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。