Once I got on the train, I felt relieved.

The fire was extinguished at once.

Once again she was lived in and taken care of.

She'll try it once more.

I'll give up drinking once and for all .

A woman is giving a book a quick once-over.

Everybody makes mistakes once in a while .

They all arrived at once.

I go to the beach once in a blue moon.

This is a once in a lifetime opportunity to travel the world.