If Tom had spent more time studying, he able to do well in the test now.
He was told that it would be at least three more monthshe could recover and return to work.
It is difficult for us to learn a lesson in life ____we’ve actually had that lesson.
---Where’s that report? ---I brought it to you ________ you were in Mr. Black’s office yesterday.
Don’t promise anything ______ you are one hundred percent sure.
There were some chairs left over _____ everyone had sat down.