He was quite `ul("concerned")` about the son's career.

He ul("concealed") his thoughts very cleverly.

A teacher, after preparinga question paper, checks testing objectives. He is concerned primarily about the question paper's

Thermodynamics is not concerned about.

We are more concerned about …………….resources.

Thermodynamics is not concerned about….

Thermodynamics is not concerned about..

He hates these ul("continual") arguments with his friends.