Поставьте must или mustn’t.

1.You look pale. I think you … see the doctor.
2.It’s very slippery outside. You … run there.
3.You … throw litter on the pavement.
4.Children … look neat and clean at school.
5.You … make noise in the library.
6.You … brush your teeth before going to bed.
7.You … fasten your seatbelt in a car.
8.Children … watch TV a lot.
9.You … light a fire in the forest.
10.You … be friendly to other people.