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    We have been good friends we joined the same ping-pong team. A. after B. before C. since D. until 【查看更多】

     

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    We have been good friends ____ we joined the same ping-pong team.

    [     ]

    A. after
    B. before
    C. since
    D. until

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    We have been good friends ________ we joined the same ping-pong team.     
    [     ]
    A.after  
    B. before  
    C. since    
    D. until

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    We have been good friends ________ we joined the same ping-pong team．

    [　　]

    A．after

    B．before

    C．since

    D．until

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