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    精英家教网 > 小学英语 > 题目详情
    There ____________ always three lights in every country: red, yellow ____________ green.

    A. is; and
    B. are; and
    C. are; or
    B
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    科目：小学英语 来源：同步题 题型：单选题

    There ____________ always three lights in every country: red, yellow ____________ green.
    [     ]
    A. is; and
    B. are; and
    C. are; or

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