He thinks his knowledge is omnipotent.

Manju is my best friend.

It's difficult to collect character tiles in mahjong.

He is good at writing, especially at writing poems.

He is a good correspondent, always writing letters.

His collection of essays shows his deep thought and insight.

I am planning to take a written exam next week.

He is learning calligraphy with a square brush.

This brush pen is easy to write with, and it's my favorite.

He used a brush rest to make detailed descriptions.