I was giving a talk to a large group of people, the same talk I()to half a dozen other groups before.A、was givingB、am givingC、had givenD、have given

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I was giving a talk to a large group of people, the same talk I()to half a dozen other groups before.

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