Ответ:

10) We mustn't play with matches because they are dangerous.

11)I play football in the evening.

12)I don't like maths because It is difficult.

13)English children have lessons on Saturday.

14)What does he do in the bathroom.

15)My friend's toy is bigger than my toy.

16)Pupils mustn't play football in the classroom.

17)

18)There is a canteen at the school.

19)There are a lot of television films about wildlife.