The restaurant only had one table available.

No one knows the answer.

I prefer one-to-one conversations over group discussions.

Please line up one by one.

They help one another in times of need.

On the one hand, I want to go on vacation, but on the other hand, I have a lot of work to do.

I used to live in New York at one time.

She completed the project on her own.

I have two apples. One is red and the other is green.

I have only one apple.