老师
Hello, welcome to my class. Today we are going to learn Unit 2, topic 2. All these problems are are very serious. Section A. I hope by the end of this class you will be able to 1st, use new expressions such as sandstone, desert, change into etc to describe how sand stones come into being. 2Nd, talk about the importance of trees. Third, realize why and how to protect trees.
老师
通过本节课的学习，希望你能运用所学表达描述沙尘暴是如何形成的，并谈论树的重要性，同时领会树的价值和保护的方法。
老师
look at the pic。 Chair, who is she? That's right. She is Officer Judy from the movie Zootopia. One day she receives some photos and a letter. Now let's listen to see what the letter is about. Dear Officer Judy.
学生
We're citizens of Zootopia. As you can see in photos, the weather is becoming worse and worse in our city, especially when the wind is strong. The sand hurts our faces. Why do we have the sandstorm? Could you help us find out the reason? We really hope our city will be clean and beautiful.
老师
原来，朱迪警官收到的是一封求助信。一位市民反映，近期动物城的天气越来越差，沙尘暴也日益增多，查看隐藏内容