Ichii is my best friend.

He is solely devoted to his work.

I kept talking with him for over an hour.

He likes to learn new words.

He is good at speaking Spanish.

He can speak Japanese fluently.

Him calling me lazy is truly a case of the pot calling the kettle black.

The Cultural Revolution is a part of China's history.

He understands the meaning of the proverb 'Teaching is half learning', which means that teaching leads to one's own learning.

He tried to solve the problem all day long.