What must and must not you do at school?eat in class

What must and must not you do at school?
eat in class * forget your books * use a mobile telephone at the lesson *write on your desk*
listen to your teacher * shout in class * forget to wear your uniform * talk to one another *
do tests without your classmates' help * do your homework for every lesson* be polite to one another
You must be polite to one another.
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