----Have you seen Mr. Black these days, Jack?
----Yes, I met him when I ________ in the street yesterday.
A.walked | B.was walking | C.have walked | D.is walking |
----Have you seen Mr. Black these days, Jack?
----Yes, I met him when I ________ in the street yesterday.
A.walked | B.was walking | C.have walked | D.is walking |