The greens didn`t catch the train when they got to the station the train ______________A.left B.was left C.has left D.had left请说明理由

Question

The greens didn`t catch the train when they got to the station the train ______________
A.left B.was left C.has left D.had left
请说明理由

Answer 1

D had left （过去完成时）
从句when they got to the station一般过去式,主句 the train had left 发生在从句之前,所以用过去完成时.