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  • --It is cold outside. You'd better wear warm clothes to          the cold.
    --Ok, thanks.
    A．keep outB．keep downC．turn downD．let down
    【考点】实义动词,实义动词的单数第三人称形式,动词短语
    【分析】请登陆后查看
    【解答】请登陆后查看
    难度：中等
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