1. What is he doing?
He is doing a puzzle.
What is she doing?
She is skating.
What is Dung doing?
He is running.
What is she doing?
She is skipping.
What are you doing?
I'm reading a book.
What is he doing?
He is swimming.
What is she doing?
She is singing.
What are they doing?
They are riding a bike.
What are you doing?
I'm jumping.
What are they doing?
They are playing football.