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    – Do you know why the river was polluted? -- Many different factors the serious pollution of the river. A. contributed to B. adjusted to C. were accustomed to D. were attached to 【查看更多】

     

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    – Do you know why the river was polluted?

       -- Many different factors ___________ the serious pollution of the river.

      A. contributed to          B. adjusted to                    C. were accustomed to   D. were attached to

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    – Do you know why the river was polluted?
    -- Many different factors ___________ the serious pollution of the river.

    A．contributed toB．adjusted toC．were accustomed toD．were attached to

    查看答案和解析>>


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