I was giving a talk to a large group of people, the same talk I ＿＿＿＿＿ to half a dozen other groups._未知科目_远程教育查题网

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题目：I was giving a talk to a large group of people, the same talk I ＿＿＿＿＿ to half a dozen other groups.
- A. was giving
- B. have given
- C. had given
- D. am giving
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