Помогите пожалуйста по англискому .Даю много баллов.
Rewrite the sentences using must , mustn't,has ,to,don't have to.
1)It isn't necessary for children to buy a ticket.Children .....................
2) It's our duty to look after our health. We ...........................................
3)It's necessary for Assel to do her exercises.Assel ...............................
4)It's against the rules to play football here.We .........................................