What is he doing?
He's cleaning the house.
What is he doing?
He's drinking cola.
What is he doing?
He is eating some chicken.
They (are / aren't) dancing.
aren't
What are they doing?
They are dancing.
What is he doing?
He's dancing.
What is the cat doing?
It is swimming.
She (is / isn't) sleeping.
is
What is he doing?
He is having breakfast.
What are they doing?
They are riding a bike.
What is she doing?
She's listening to music.
He (is / isn't) playing videogames.
isn't
What is he doing?
He's running.
What is he doing?
He is playing videogames.
What is she doing?
She's cooking.