The train has started operating.

The train service is delayed today.

He was chosen as the successor of the company.

The elevation of Mount Fuji is 3,776 meters.

The plan is too rigid, making it difficult to change.

His body stiffened with fear.

His opinion is rigid, and it's hard to change.

This performance was a great success.

We are planning to give a performance of a new play next week.

Goguryeo was a country that existed on the Korean Peninsula in ancient times.