题目内容

―The telephone is ringing.
―I _________ answer it


  1. A.
    will
  2. B.
    am going to
  3. C.
    am to
  4. D.
    am about to
A
be going to do表示“已计划好要做某事”,be to do与be about to do有时意思一样,都是“正要做某事 (忽然另一个动作发生了)”。
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