( ) pretty late,we decided to leave at once in order to catch the last busA being B it being 选哪个,
问题描述：
( ) pretty late,we decided to leave at once in order to catch the last bus
A being B it being 选哪个,
答
选A，这里表示原因。 因为太晚了，......
更多细节，需要参考Be动词的用法。
答
B
it being late it指时间或者天, 天太晚了, 我们决定离开
如果用A being , 非谓语动词作状语, 那么要满足主语一致,这里很明显主语不一致,这时候要把不一致的主语加到 非谓语动词前.
比如His mother being ill, he stayed at home to look after her.