Must, mustn't, should, shouldn't (School rules)

You ____ eat at the classroom!

You ____ be a good friend.

You____ fight.

You ____ use a mobile phone in the class.

You ____ ask for help if you need it.

You ____ chew a gum in the class.

You _____ be tidy.

You ____ drop litter on the floor.

You _____ wear a mask when you are ill.

You _____ sleep at the lesson.

You _____ active at the lessons.

You ___ do your homework.