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    35．Air pollution, together with littering, many problems in our large industrial cities today． A．causes B．cause C．caused D．causing 【查看更多】

     

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    Air pollution, together with littering, __________ many problems in our large industrial cities today．

    [　　]

    A．causes

    B．cause

    C．caused

    D．causing

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    Air pollution, together with littering, ____ many problems in our large industrial cities today.

    A．causesB．causeC．causedD．causing

    查看答案和解析>>

    Air pollution, together with littering, ____ many problems in our large industrial cities today.

    A．causes

    B．cause

    C．caused

    D．causing

     

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