There are 20 students in our class.

He is an employee of that company.

He is a true gentleman.

That person is my friend.

The American red wolf is one of the endangered species.

The whooping crane is an endangered species, and it is difficult to see its beautiful figure.

My dream is to live in the United States of America someday.

The American continent is where diverse cultures and nature coexist.

He likes to take a walk in the park at dusk.

He is spending a lot of time on experimental research.