What are you doing?
I'm sailing boat.
What are you doing?
I'm riding a motorbike.
What are you doing?
I'm driving a truck.
What are you doing?
I'm flying a plane.
What are you doing?
I'm driving a car.
What are you doing?
I'm riding a bike.
What are you doing?
I'm driving a school bus.
What are you doing?
I' m driving a train.