By the time I ( )the railway station ,the train ( ).为什么选got to;left而不选reached;had left呢

问题描述:

By the time I ( )the railway station ,the train ( ).为什么选got to;left而不选reached;had left呢
求讲解,

By the time I ( )the railway station ,the train ( ).译:在我达到火车站前,火车(已经离开)了.这里主要是时态问题,单词其实都可以用的.1.第一空填 got to或 reached 都可以的,都是到达某地,都是一般过去式.2....