I was giving a talk to a large group of people, the same talk I ______ to half a

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问题 I was giving a talk to a large group of people, the same talk I ______ to half a dozen other groups.

选项 A、was giving
B、am giving
C、had given
D、have given

答案 C

解析过去完成时把时间推移到过去某一时间之前，与现在不发生联系，表示一个动作或状态在过去某一时间或动作之前已经发生或完成。had given to half a dozen other groups发生在was giving a talk to a large group of people之前。

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