第一节:单项填空(共15小题,每小题1分,满分15分)

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。

21. --- Let’s discuss the question raised last night, shall we?

   --- There is no hurry for that. I     for a conference.

    A. headed       B. was heading   C. am heading   D. have headed

  • 答案
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