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    I’m sorry to keep you so long. 【查看更多】

     

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    I'm sorry to keep you _____ so long.   
    [     ]
    A. wait        
    B. to wait      
    C. waiting    
    D. waited

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    I’m sorry to keep you     so long.

    A. wait      B. waiting      C. to wait    D. waited

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    I'm very sorry to keep you _          so long. I have something important to do.           
    [     ]
    A. wait                  
    B. waiting                
    C. waiting for             
    D. waited

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    I'm so sorry to keep you        for a long time.  
    [     ]
    A. waiting        
    B. to wait      
    C. wait          
    D. waited

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    用所给词的适当形式填空:

    I'm sorry to keep you ______ (wait) so long.

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