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    While writing a letter, . A. The doorbell rang B. The doorbell rings C. I heard the doorbell ring D. I heard the doorbell rings 【查看更多】

     

    题目列表(包括答案和解析)

    While writing a letter, ________．

    [　　]

    A．The doorbell rang

    B．The doorbell rings

    C．I heard the doorbell ring

    D．I heard the doorbell rings

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