The poor girl across the road a car knocked her down.
A. walked; while
B. walked; since
C. was walking; until
D. was walking; when
网友回答
A. walked; while
B. walked; since
C. was walking; until
(答案→)D. was walking; when
解析:根据时间状语从句,从句的动作发生在主句动作之中,主句用进行时,而从句用一般过去时,故选D