she was concerned only with finding a way to keep control of the post until her son was old enough
问题描述：
she was concerned only with finding a way to keep control of the post until her son was old enough
to supervise it
答
她目前只专注去寻找一种能够保持控制她职位,直至她儿子长大的方法.
supervise 有监督的意思
to supervise it ,即是去监督一件事