You mustn't swim here., You mustn't use your mobile phone., You must do your homework on time., You must come on time to school., You mustn't park here., You mustn't eat or drink in the classroom., You mustn't run at school., You mustn't talk in the lesson., You must listen to the teacher., You mustn't cheat in exams or tests., You mustn't sleep in the class., You must work in the lessons., You must have books, notebooks and a pencil case. , You mustn't turn left. , You must wash your hands very often. , You must make notes. ,

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