题目内容

---Tom didn’t come last night,did he?
---No.I _______ have waited for him.A whole night was wasted.


  1. A.
    would
  2. B.
    should
  3. C.
    couldn’t
  4. D.
    needn’t
D
needn’t have done表示“本没有必要做但实际上做了”。
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