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

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

A.walked; was coming

B.was walking; came

C.walked; came

D.was walking; was coming

答案及解析： 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。