4.
2 They are riding horses.
3 She is watching TV.
4 They are having lunch.
5 She is driving a bus.
6 They are running.
7 He is washing the car.
8 He is cooking.
5.
2 Is Mum watching TV? Yes, she is.
3 Are the girls eating? No, they aren't. They are playing with dolls.
4 Is Dad reading a book? Yes, he is.
5 Is dog playing with a ball? No, he is not. He is sleeping.