Mike was usually so careful, ________ this time he made a small mistake.
______ he did not want to, he still had to share his hotel room with a stranger.
He said he would come to attend the lecture if he ___________ time.
--- 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.