He isn’t reading. He is looking at the spider.
She isn’t working. She is listening to music.
They aren’t playing tennis. They are arguing.
She isn’t running. She is having a drink (или has, так как have модальный глагол и по сути не употребляется в Continuous)
They aren’t playing. They are sitting in the car.
Are you tidying your room? f
Am I dreaming? e
Are they arguing? b
Is Jack having his lunch? c
Is the film starting? a