【正文】
教學(xué)步驟: Pretask Preparation students how much they know about water. Ask them to finish Exercise A on page 2. Keys: a c a c c 2. Ask the students to finish Exercise B1 on page 2. 3. Ask the students to tell something about water. (free talk)[ Suggested topic Where does the water at home e from? What can we use water to do? the importance of water Whiletask Procedure 1. New words and expressions pouringflowing frozestopped moving because of surprise wastingusing more of something than you should obeyeddid according to instructions cleaned upmade something clean in the first placein the beginning valuableof great value 2. other phrases and sentence pour into look around drop… into carry… to water treatment works sewage plant pump… into remember not to do sth. shake one’s head It is + adj. for sb. to do sth. 3. Ask the students to finish Exercise B1