What are you doing?
I'm playing video games.
What are you doing?
I'm drawing.
What's she doing? (homework)
She's doing homework.
What's she doing?
She's cleaning.
What's he doing?
He's running.
What's he doing?
He's listening.
What are they doing?
They're singing.
What's he doing?
He's reading.
What are they doing?
They're dancing.
What are you doing?
I'm sleeping.
What's he doing?
He's swimming.
What are you doing?
I'm watching TV.