2) is cooking food ( What is father cooking?)
3) is driving a car (What is mother driving? )
4) is writing on a blackboard (What is the teacher writing on?)
5) are studying (What are the students doing?)
6) is opening the door (What is the girl opening?)
7) is taking a shower (What is the boy doing?)
8) are sleeping (What are the babies doing?)
9) are playing football (What are the children playing?)