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    We must do something to the factories sending out poisonous gases so as to keep the city clean and beautiful. A. keep B. protect C. permit D. prevent 【查看更多】

     

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    We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.

    A．keep

    B．protect

    C．permit

    D．prevent

     

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    We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.


    1. A.
      keep
    2. B.
      protect
    3. C.
      permit
    4. D.
      prevent

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    We must do something to _____ the factories sending out   poisonous gases so as to keep the
    city_____.      
    [     ]
    A. keep; being polluted      
    B. keep; from being polluted    
    C. prevent; being polluted      
    D. prevent; from being polluted

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    We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.

    A. keep           B. protect             C. permit          D. prevent

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    We must do something to ________ the factories sending out poisonous gases so as to keep the city clean and beautiful.

    A．keepB．protectC．permitD．prevent

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