— I phoned you at 7 yesterday evening but nobody answered.
— Oh, I my dog in the park then.
A. walked
B. was walking
C. had walked
D. would walk
网友回答
A. walked
(答案→)B. was walking
C. had walked
D. would walk
解析：考查时态：句意：--昨天晚上7点我打电话给你，但是没有人接电话。--哦，那个时候我正在公园遛狗。这里的then指的是at 7 yesterday evening，所以遛狗这个动作是过去某个时间正在做，用过去进行时。选B。