题目内容

I ________ when he came in.


  1. A.
    was having lunch
  2. B.
    had lunch
  3. C.
    had had lunch
  4. D.
    would have
A
本句意为“当他进来的时候,我正在吃午饭”。when表示“就在那时或突然”,故主句用过去进行时。
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