If you _____ regret things you did or didn’t do in the past, then you won’t be able to move forward.
My mother is always warning me when I go out, “Don’t get off the bus ____ it is stopping.”
It was not until 1920 ___ regular radio broadcasts began.
Are you feeling ___?
There will be a ___ football match on TV tonight.
He teaches in ___ university and is ___expert on politcs.