I know them _____when they were young

问题描述:

I know them _____when they were young
A to have been friends B to be friends哪一个对啊?我觉得B对.

应该是A的,就是现在完成时,意思就是他们小的时候就是朋友,用现在完成时,隐含的意思就是他们现在还是朋友,而B意思就是他们小的时候是朋友,隐含的意思就是现在不是了,那个朋友的状态已经是过去了,现在不是了