It was only a very short time the young lady found her cellphone stolen as she got on the crowed bus.
A. before
B. when
C. since
D. after
网友回答
(答案→)A. before
B. when
C. since
D. after
解析：考查固定句型：It was+一段时间+before…，过了一段时间才/就…，句意：只过了很短的时间这个年轻的女士就发现在上拥挤的公共汽车的时候，她的手机被偷了。选A。