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    A series of meetings about the best way to market the new product A. are held B. were held C. was held D. have been held 【查看更多】

     

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    A series of meetings _____ about the best way to market the new product

        A. are held B. were held     C. was held  D. have been held

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    A series of meetings ________ about the best way to market the new product

    [　　]

    A．are held

    B．were held

    C．was held

    D．have been held

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