____out of work for a few months,mother took up the job of waiting on patients in hospital.

题目

____out of work for a few months,mother took up the job of waiting on patients in hospital.
A To be B being C Having been D Haing.
我知道选B是分词的完成时是表示分词的动作出现在主句动作之前,
B选项,being是个什么样的词?做什么作用?

答案

C吧.经过数个月的失业,mother终于找到了在医院照料病人的工作.
having been out of work表示过去的动作,前面省略了after
being 表示同时进行的动作或状态.