◎ 题干
There ____________ always three lights in every country: red, yellow ____________ green.
[     ]
A. is; and
B. are; and
C. are; or
◎ 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“There ____________ always three lights in every country: red, yellow ____________ green.[ ]A. is; andB. are; andC. are; or…”主要考查了你对  【therebe句型】【连词】  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。