I ___at the station half an hour ago ,but now the train ___yet.A.arrived;hadn't come
问题描述：
I ___at the station half an hour ago ,but now the train ___yet.A.arrived;hadn't come
B.was arriving;hadn't come C.arrived;hasn't come D.had arrived;didn't come 我知道正解是C,但为什么不能选B呢,“half an hour ago”不是过去的一个具体的时间吗?
答
arrive - 动作不可持续,所以就没有现在进行时的用法
The train is arriving - 是表示将来,很快就要到达