Question

-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

Answer 1

A
考查動(dòng)詞時(shí)態(tài)。根據(jù)時(shí)間狀語this morning可知時(shí)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(shí)間正在進(jìn)行的動(dòng)作，用過去進(jìn)行時(shí)，選A。難度適中。