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    The policemen are very glad the old people if they have any trouble. A. help B. to help C. helping D. helps 【查看更多】

     

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    The policemen are very glad ______ the old people if they have any trouble.
    [     ]

    A. help      
    B. to help    
    C. helping  
    D. helps

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    The policemen are very glad ________ the old people if they have any trouble(麻烦)．

    [　　]

    A．help

    B．to help

    C．helping

    D．helps

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