You should protect your own health.

Please teach me how to do this problem.

It is important for us to respect cultural diversity and understand each other's differences.

Nakata is my best friend.

Many insects live in the vicinity of the roots of this tree.

That person (polite) is my boss.

This person is my new friend.

A bus passes in front of my house every day.

He is recognized as the authority of that project.

I sent him three letters.