They help one another in times of need.

All but one person attended the meeting.

The customers arrived one after another.

The diocese of Tokyo is one of the largest in Japan.

The decision was counterintuitive, but it proved to be the right one.

put forth one's best efforts

This bracelet is more expensive than that one.

This beer mug holds one pint.

That bar is one of his favorite haunts.

Matthew is one of the twelve apostles of Jesus.