Are you going to the summer camp next month—____. I can’t miss such a good opportunity to temper myself.

I wasn’t blaming anyone; I _____ said errors like this could be avoided[ ]

I also told them if they wanted a copy of my book ____ my office. I would be happy to send one to them.[ ]

It’s very kind _________ you to give your seat to me .

We have done things we ought not to have done and_____ undone things we ought to have done