The students were ____ over the ____ problem, listening to the teacher with a ____ expression on their faces.
--- Shall I tell John about it? --- No, you _____. I’ve told him already.
No one will be sure ____________ in a million years.
PSAs are often run _____ free, and are ______ to educate people about health, safety, or any other problem that affects public welfare.
You _________ be punished if you break the school rules.
Have you considered _________ abroad to receive further study after graduation?