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    I was giving a talk to a targe group of people,the same talk I to half a dozen other groups. A.was giving B.am giving C.had given D.have given 【查看更多】

     

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    I was giving a talk to a targe group of people,the same talk I __________to half a dozen other groups.

    A.was giving        B.am giving     C.had given         D.have given

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