这里that was 这样用可以吗?

题目

这里that was 这样用可以吗?
前提：Pls.make sure the bag is put in the box before you leaving office!
回答：Don't worry about this,that was done!

答案

That was done的意思简单的翻译的话就是“那已经做好了”.
前提： 请在离开办公室之前把包放进箱子里.
回答： 不用担心,那已经做好了.
另外,应该是Pls. make sure the bag is put in the box before you leave the office!而不是leaving office.
还有,应该是Don't worry about that, that was done!,而不是Don't worry about this.