.............. are you doing? - We are playing.
What
What are you doing?
I'm reading a book.
Are they watching TV?
No, they aren't.
What is he doing?
He is washing the car.
What is she doing?
She is brushing her hair.
What are they doing?
They are doing homework.
Is she taking photos?
No, she isn't.
Who are they?
They are a music band.
Is he eating pizza?
No, he isn't.
What are they doing?
They are talking.
Are they dancing?
No, they aren't.
Are they playing the guitar?
No, they aren't.