He is studying about the ancient royal family.

He started running to chase the criminal.

Oh, if that's the case, it's fine.

He is a person who can make an appropriate response in any situation.

He always takes an arrogant attitude.

I can't stand his arrogant attitude.

The colossal squid is the largest squid living in the deep sea.

He was as quiet as the dead.

He is suffering from the symptoms of black hairy tongue.

The moonlight was dim, and I couldn't see anything.