SHOULD/MUST

You ---- wash your hands before eating.

You ---- --- run in the corridors.

You ---- eat a lot of vegetables.

You ---- --- speak loudly in the libraries.

You ---- look both ways before crossing the street.

You ---- --- eat fast food.

You ---- --- use the elevators in an emergency.

You ---- feed stray cats and dogs.

You ---- --- use your phone in the classroom.

You ---- --- be rude to service workers.