I once wanted to be an astrophysicist.
Once we thought that Man couldn't fly.
Once in a while everything goes wrong.
I'll pay you back once I receive my salary.
I once sat at the same table with him at a dinner party.
Once you skip a lesson, it's hard to catch up with your classmates.
She told me once and for all that she did not want to see me again.
He once lied and told her a rare creature lived in her closet.
All at once, the Buddhist priest burst into laughter, spoiling the solemn atmosphere.
Angola was once a Portuguese territory.
I don't understand and I'm not used to not understanding. Please explain it once more.
I know that it is highly unlikely that you'd ever want to go out with me, but I still need to ask at least once.
Tom brings his children with him to work once or twice a year.
The Japanese public bathhouse was once used as a center of social life in one's neighborhood.