What is he doing?
He is eating
What is he doing?
He is writing/studying
What is she doing?
She is reading a book
What is she doing?
She is singing
What are they doing?
They are dancing
What is she doing?
She is cooking
What is he doing?
He is swimming
What are they doing?
They are playing football
What are they doing?
They are talking/discussing
What are they doing?
They are watching tv