-Did you watch the football match yesterday?-- Yes I did. You know my brother in

问题补充：

---- Did you watch the football match yesterday?

---- Yes, I did. You know, my brother in the match at that time.

A. is playing

B. was playing

C. has played

D. had played

答案：

A. is playing

(答案→)B. was playing

C. has played

D. had played

解析：考查时态。根据关键词at that time在那时，这是一个过去的时间点，表示在过去的一个时间点上发生的事情，使用过去进行时。句意：—昨天你看那场足球赛了吗？—是的我看了。你知道，在那时我的哥哥正在参加那场比赛。故B正确。