Unit 3 Protecting Ourselves Welcome to the unitMany people die or get ill every day for various reasons. Can you name some?diseases, natural disasters, traffic accidents,environment pollution, heavy work pressure, lack of exercises and so on.Among all these reasons, aids, drinking, drugs and smoking are four main killers.Discuss the following questions:1. What do you think are good habits in one’s daily life? What are bad habits?2. What do you think go..