Which is WRONG？


  1. A.
    These street lights have been turned on for three days．
  2. B.
    These street lights have been on for three days．
  3. C.
    These street lights have been on for the past three days．
  4. D.
    These street lights have been on since three days ago．
A
分析：A項的動詞是turn on，是短暫性動詞，盡管用的是被動語態(tài)，同樣不能和for+一段時間連用。B，C，D都是用have been on表示狀態(tài)的延續(xù)，只是后面時間狀語的不同，但這三個時間狀語都可以做表示狀態(tài)的動詞的現(xiàn)在完成時的時間狀語。
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