His hobby is collecting loose stones.

The Neolithic was an important period in human history.

The calculation of integrals is an important part of mathematics.

There are many ancient stone Buddhist images in this park.

Who is the person in charge of the project?

This stone tablet is inscribed with ancient history.

She blushed in front of me.

He blushed with shame.

What is the area of this room?

The police started chasing the criminal.