精选优质文档-倾情为你奉上Unit 1 The Changinging WorldTopic 1 Our country has developed rapidly. Section AThe main activity is 1a. 本课重点活动是1a。. Teaching aims and demands 教学目标1. Learn some new words and a phrase:proper, by the way, bell, grandpa, chairwoman, grandson2. Learn a useful sentence: There goes the bell.3. Learn the present perfect tense:(1)Rita, you have just come back from your hometown.(2)Where have you been, Jane?I have been to Mount Huang with my parents.(3)