问题补充：
The train for five minutes by the time we got there.
A. had left
B. left
C. was leaving
D. had been away
答案：
A. had left
B. left
C. was leaving
(答案→)D. had been away
解析：表示延续性的时间状语for five minutes, 不可与leave一起用, got的动词先于主句中的谓语的动作或状态,所以选had been away.
