教材分析
This is the fourth teaching period of this unit. As usual, the teacher will first get students to review what they learned in the last period, and then lead in the new lesson.
We will mainly deal with listening and speaking in this period. At the beginning, students listen to a dialogue between Wang Peng and an expert. Make sure students go through the exercises before they listen to the tape. This is to sharpen their attention and listen for the answers. This will also help them get the gist of the listening text.
