Вставте: must,mustn't или can't. 1.please don't make so much noise.we wake the children. 2.there isn't much time.we . 3.you cook your meals in the room.it isn't allowed. 4.you wear a seatbelt when you are in a car.that's the rule. 5. put posters in the room.it's forbidden.

1.Please don't make so much noise. We mustn't wake the children.
2.There isn't much time. We must hurry.
3.You can't cook your meals in the room. It isn't allowed.
4.You must wear a seatbelt when you are in a car. That's the rule.
5.You mustn't put posters in the room. It's forbidden.