单项选择。从A、B、C、D四个选项中选出可以填入空白处的最佳*。---HaveyouseenMr.Black...

问题详情：

单项选择。从A、B、C、D四个选项中选出可以填入空白处的最佳*。

---Have you seen Mr. Black these days, Jack? 

   ---Yes, I met him when I _______ in the street yesterday.

       A. was walking             B. walked             C. have walked             D. is walking

【回答】

A

知识点：动词时态

题型：选择题