I have been to France once.

He finished all his work all at once.

Our school has introduced a new PA system.

The filesystem of my computer has broken down.

This road is a dead end, so we have to find another way.

In this country, the law is being respected.

In this school, the school rules are strictly enforced.

Ritsu is my best friend.

He reached the age of thirty, marking a new milestone in his life.

She has a spirit of independence.