He is deeply interested in academic research.

He is a very sociable person who can get along with anyone quickly.

His artwork is very abstract, making it difficult to understand.

He is a ruling presence in the class.

He is knowledgeable about military strategies.

We should build a democratic society.

He has a passive personality and rarely takes action on his own.

His opinion is always rational.

He made a concrete plan.

This project is making substantial progress.