【正文】
學(xué)用具 ): 錄音機(jī)、自制課件、照片等 Teaching Procedures(教學(xué)過程 ): StepⅠ .Warm up and revision(熱身與復(fù)習(xí)) 1. Greetings. 2. Guessing game. Step Ⅱ .Presentation and practice (自主探究 ) T: Please write the meanings on your paper air______ smoke ______ factory ________ dirty________ clean______