The thirty-first day is my birthday.

We have our wedding on the twenty-first day of the month.

The motto of this team is 'one for all, all for one'.

I have been to France once.

His first choice of school is the University of Tokyo.

He has a competitive spirit that does not allow even one defeat.

He finished all his work all at once.

I ate one apple.

He is the best student in the class.

I went to see a movie alone.