—Whydidn'tyoutryyourbesttogetonthesubway?—Itriedto,but...

问题详情：

 —Why didn't you try your best to get on the subway?

—I tried to, but it started moving_________I could get on it.

A. before       B. after       C. since           D. if

【回答】

A

知识点：连词

题型：选择题