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    30．I my homework the telephone rang at 8 last night． A．was doing,when B．did,when C．was doing,while D．did,while 【查看更多】

     

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    I ________ my homework ________ the telephone rang at 8 last night．

    A．was doing；when                                      B．did；when

    C．was doing；while                                       D．did；while

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    I  ________ my homework ________ the telephone rang at 8 last night．

    A．was doing；when             B．did；when          

    C．was doing；while             D．did；while

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