但我不懂.....The window ____a moment ago .No one knew who had done it.A.had been broken B.was broken C.has been broken D.broke我想知道,had跟was有什么关系吗?..为什么不可以选A呢?(汗....)
问题描述：
但我不懂.....
The window ____a moment ago .No one knew who had done it.
A.had been broken B.was broken C.has been broken D.broke
我想知道,had跟was有什么关系吗?..
为什么不可以选A呢?(汗....)
答