What is she doing?
She's using a cash register.
What is he doing?
He's cleaning the school.
What is he doing?
He is answering the phone. / He is talking on the phone.
What are they doing?
They're taking care of (the) grounds.
What is he doing?
He's fixing the light. / He's installing a light.
What is she doing?
She's serving food.
What are they doing?
They're working on a building.
What is she doing?
She's helping a patient.
What is she doing?
She's driving a truck.
What is he doing?
He's taking care of children.
What is she doing?
She's treating a patient. / She's helping a patient.
What are they doing?
They're painting a house.
What is he doing?
He's supervising workers.
What is she doing?
She's using a computer.
What are they doing?
They're helping customers.
What is she doing?
She's teaching math.
What's she doing?
She's fixing the sink.
What are they doing?
They're making food.
What is he doing?
He's making copies.
What's he doing?
He's fixing the car.