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    2．There is still a long way to go to work out all the problems conservation of natural resources． A．concerning B．concerned C．to concern D．concern 【查看更多】

     

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    There is still a long way to go to work out all the problems ______________conservation of natural resources. w*w*w*k*s*5*u*c*o*m

    A.concerning　 　　 B.concerned　 C.to concern D.concern

     

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    There is still a long way to go to work out all the problems ________ conservation of natural resources.  
    [     ]
    A. concerning        
    B. concerned        
    C. to concern          
    D. concern

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    There is still a long way to go to work out all the problems       the conservation of natural
    resources.
    [     ]
    A.concerning
    B.concerned
    C.to concern
    D.concern

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