When I arrived at the station, the train had already _____.

问题描述:

When I arrived at the station, the train had already _____.
A)depositedB) depressedC) departedD) deprived

答案为c (离开)
A 的意思为“存;使...沉积”
B 的意思为“抑郁;不景气”
D 的意思为“剥夺;使失掉”
(注:这是一个学习 "过去完成时 ”的好例句)