What are they doing? (do athletics)
They are doing athletics.
What are they doing?
They are playing badminton.
What is he doing?
He is playing table tennis.
What are they doing?
They are sailing.
What are they doing?
They are cycling.
What is he doing with the ball?
He is kicking the ball.
What do they do?
They play badminton.
What do they do?
They play hockey.
What do they do?
They play volleyball.
