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    7、Every housewife knows that it’s dangerous to open the cover of the washing machine        _______  it is still drying clothes .

    A. until         B. before        C. while         D. after

    7、C

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    Every housewife knows that it’s dangerous to open the cover of the washing machine        _______  it is still drying clothes .

    A. until         B. before        C. while         D. after

    查看答案和解析>>

    科目：高中英语 来源： 题型：

    Every housewife knows that it’s dangerous to open the cover of the washing machine        _______  it is still drying clothes .

    A. until         B. before        C. while         D. after

    查看答案和解析>>


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