It got so bad that he had other employees calling him telling him that their colleagues were slacking o! so much that it they couldn’t do their own jobs.
这个地方的that it 是个什么用法?
《高考英语备考1号·速效编》
《高考英语备考1号·写作编》
《高中英语晨读晚记》
《高中英语错题笔记》
《零起点考大学英语》