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    The earthquake when I some cleaning. A. starts, was doing B. started, was doing C.was starting, was doing D.starts, were doing 【查看更多】

     

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    The earthquake _____ when I _____ some cleaning.        
    [     ]
    A. starts, was doing          
    B. started, was doing  
    C. was starting, was doing    
    D. starts, were doing

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    The earthquake ____ when I ____ some cleaning.
    [     ]
    A. starts, was doing          
    B. started, was doing  
    C. was starting, was doing    
    D. was starting, did

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    The earthquake ____ when I ____ some cleaning.

    A. starts, was doing B. started, was doing　

    C. was starting, was doing　　 D. starts, were doing

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     The earthquake ______ when I _______some cleaning.

    A．starts, was doing                        B．started, was doing

    C．was starting, was doing                   D．starts, were doing

     

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    The earthquake ____ when I ____ some cleaning.

    A．starts, was doing                        B．started, was doing

    C．was starting, was doing                   D．starts, were doing

     

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