Unit 2 Saving the EarthTopic 1 Pollution is harmful to peoples health.Section AThe main activities are 1a, 1b and 3a. 本课重点活动是1a、1b和3a。. Teaching aims and demands 教学目标1. Learn some new words and phrases:bee, my goodness, waste, stream, breathe, be harmful to, influence2. Learn some useful sentences: (1) Oh, my goodness! (2) Look, there are several chemical factories pouring waste water into the stream.3. Learn direct speech and indirect speech:(1) Kangkang said that it
