Ответ:

You must always do your homework. ...

You must wear a school uniform. ...

You must arrive at school on time. ...

You mustn't shout in class. ...

You mustn't eat in class. ...

You must listen to the teacher. ...

You mustn't use your phone in the classroom. ...

You mustn't eat a chewing-gum in the classroom.

Ответ:Правила по какому классу?