-Has Tommy fixed his second-hand car yet?

-I have no idea, but he ________ it this morning．


  1. A.
    was doing
  2. B.
    is doing
  3. C.
    has done
  4. D.
    did
A
考查動詞時態(tài)。根據(jù)時間狀語this morning可知時間是過去，且根據(jù)句子意思可知所填部分表示過去某一時間正在進行的動作，用過去進行時，選A。難度適中。
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