问题补充:
I my pen when I in the park.
A. lost; was walking
B. lost; walked
C. was losting; was walking
D. was losting; walked
答案:
(答案→)A. lost; was walking
B. lost; walked
C. was losting; was walking
D. was losting; walked
解析:考查时态。句意“当我正在公园散步时,我的钢笔丢了。”lose是短暂性动词,不能用于进行时,排除C、D;根据句意可知,A项正确。故选A。