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    While watching TV, . A. the doorbell rang B. the doorbell rings C. we heard the doorbell ring D. we heard the doorbell rings 【查看更多】

     

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    While watching TV, ____.

             A. the doorbell rang         B. the doorbell rings        

             C. we heard the doorbell ring D. we heard the doorbell rings

     

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    While watching TV, ____.

           A. the doorbell rang      B. the doorbell rings     

           C. we heard the doorbell ring       D. we heard the doorbell rings

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    While watching TV, _______.

    A. the doorbell rang　　 　　　　　　B. the doorbell rings

    C. we heard the doorbell ring　 　　　 D. we heard the doorbell rings

     

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