He is an employee of that company.

He is a true gentleman.

There are 20 students in our class.

That person is my friend.

Him calling me lazy is truly a case of the pot calling the kettle black.

He was studying all day.

On cold days, earmuffs are necessary.

This ancient document contains the word 'だいくんゐ'.

He is a late sleeper and often late for school.

The concept of chemical equivalent is essential for understanding chemical reactions.