Andy has an exam tomorrow. He should study for it.
You should eat healthy food.
We should prevent water pollution.
We should brush our teeth three times a day.
When you ride a bike, you should wear a helmet.
We should protect endangered animals.
You should keep the environment clean.
You should go on a diet and do exercise.
You should find a part-time job after school.
You should use recycling bins.
You should listen to your candidate very carefully.
We should plants more trees.
You should learn French.
You should make your speech very interesting.