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    Experts are trying to work out a plan to deal with the problems caused by global warming it is too late. A. when B. if C. before D. until 【查看更多】

     

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    Experts are trying to work out a plan to deal with the problems caused by global warming ______ it is too late.

    A．whenB．ifC．beforeD．until

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    Experts are trying to work out a plan to deal with the problems caused by global warming ______ it is too late.

    A．when            B．if                C．before            D．until

     

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    Experts are trying to work out a plan to deal with the problems caused by global warming _________ it is too late.


    1. A.
      if
    2. B.
      before
    3. C.
      when
    4. D.
      until

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    Experts are trying to work out a plan to deal with the problems caused by global warming________
    it is too late.
    [      ]
    A. when  
    B. if  
    C. before  
    D. until

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    Experts are trying to work out a plan to deal with the problems caused by global warming________
    it is too late.
    [     ]
    A .when  
    B．if  
    C．before  
    D．until

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