•We can offer you refunds if the goods you returned are not dirty and unusable.•You can get refunds if the goods you returned remain clean and usable.请问这两句话中 if 后的时态是否正确?
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?