We meet to study at the library every Friday.

This mirror is a concave mirror.

Please push the door to open it.

We keep this old ritual every year.

I take a walk by the riverbank every day.

He is a very excellent performer.

He is an excellent engineer.

It is said that cavemen discovered how to use fire.

Seiji is my best friend, he is always a fair and just person.

Mr. Watanabe is my best friend.