题目内容

--When did this accident happen?

--It happened ________six o'clock ________ the afternoon of last Monday.


  1. A.
    at; in
  2. B.
    in; on
  3. C.
    about ; at
  4. D.
    at; on
D
具体的时刻前用介词at,特指某一天时用介词on。
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