huy nguyễn
1. Eat better food, and you won’t get sick.  If you 2. Save energy, and you will save some money.  If you 3. Protect the earth or we will have no place to live.  If we 4. Unless you study it, you won’t understand it.  If you 5. If you don’t study harder, you won’t pass the exams.  Unless you 6. Don’t pollute the air, or we will have breathing problems.  If we 7. Keep the water clean, or the fish in this lake will die.  If you 8. Remember to turn off all the lights here, or you will waste lots of electricity.  If you 9. Be patient, or you won’t pass the examination.  If you 10. Plant more trees, or the air will be more polluted.  If we