用having been done 造句
问题描述：
用having been done 造句
答
The work, having been done to repair frost damage, has been found to be inadequate.
答
The experiment having been done,the students left the laboratory.做完这个实验后,学生们就离开了实验室.The business having been promised must be done.答应别人的事一定要做到.John has been aware of having...