Question

Yesterday I ________ in the street when I across one of my old classmates．

1. A.
   walked; was coming
2. B.
   was walking; came
3. C.
   walked; came
4. D.
   was walking; was coming

Answer 1

B
解析：
延续性动词用过去进行时，短暂性动词用一般过去时。