问题补充:
— 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
答案:
(答案→)A. before
B. after
C. since
D. if
解析:句意:——为什么你不尽最大努力坐地铁呢?——我已经尽力了,但是我还没来得及登上地铁,它就开始移动了。A. before在……之前,还没来得及; B. after 在……之后; C. since自从;D. If如果。结合句意,故选A。