The teacher gave me a book.

The teacher gave me some advice.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.

Asuna is my best friend.

You shouldn't laugh at his failure, because misfortunes can happen to anyone.

The agenda at the summit meeting was measures on environmental issues.

We discussed the new project in the meeting room.