1 You must listen to your teacher
2 You mustn't eat at the lesson
3 You mustn't talk with your classmates at the lesson
4 You mustn't chat on the phone at the lesson
5 You mustn't argue with your teachers
6 You mustn't miss your lessons
7 You must answer teachers' questions
8 You must be polite with your classmates and teachers
9 You must be very attentive at school
10 You must get only good and excellent marks
11 You mustn't bring your pets at school