I was giving a talk to a group of people.I

发布时间：2021-02-23 01:20:58

I was giving a talk to a group of people.I

网友回答

填:had given
was giving 是过去动作,在此之前曾给其他几群人作过同样的报告,
故应用过去完成时.
句意:我当时正在给一群人作报告,在此之前我曾给其他几群人作过同样的报告
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