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

I … have lunch because I am hungry.

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 _____ work in a team

You ____ bring your toys to school

You _____ be tidy

You ____ drop litters 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

You ___________ arrive late to school