While she                     TV in the sitting room，the bell                  ．

A．watches，rings                                       B．is watching，rang

C．was watching，rang                           D．watched，was ringing

1、C

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While she                     TV in the sitting room，the bell                  ．

A．watches，rings                                       B．is watching，rang

C．was watching，rang                           D．watched，was ringing

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