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    精英家教网 > 高中英语 > 题目详情
    All communication has to be open, honest, and patient if a happy and healthy relationship _____.

    A. will maintain
    B. is maintaining
    C. are maintained
    D. is to be maintained
    D
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    科目：高中英语 来源：湖南省模拟题 题型：单选题

    All communication has to be open, honest, and patient if a happy and healthy relationship _____.
    [     ]
    A. will maintain
    B. is maintaining
    C. are maintained
    D. is to be maintained

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