He is an expert in ethology.

The climax of this movie is the scene where the protagonist defeats the enemy.

I attended a lecture on economics today.

The Yangtze River is the longest river in China.

His business is in very good condition.

A public hearing is an important place to listen to the opinions of citizens.

He began to feel the symptoms of a cold.

A blush rose on her cheeks from embarrassment.

She blushed out of embarrassment.

I saw some bad signs from his complexion.