约5680字。

　　Unit 2 Saving the Earth
　　Topic 1 Pollution causes too many problems.
　　Section A
　　I. Teaching aims and demands:
　　1. Learn the usage of direct speech and indirect speech.
　　2. Talt different kinds of pollution in order to enhance the awareness of environmental protection.
　　II. Important points:
　　1. bee, my goodness, waste, stream, breathe, be harmful to, influence
　　2. direct speech and indirect speech
　　3. some useful sentences
　　III. Teaching procedure:
　　Step 1 Review
　　Show a picture in which the town’s environment is seriously polluted by chemical factories. Lead to the topic of environmental pollution by talking about the picture. Understand the new word “chemical”.
　　Step 2 Presentation
　　1. Learn 3a and 3b.
　　(1) Show different pictures of environmental pollution in 3a. Let students have a general idea about different kinds of pollution. Then asdents to tell what kind of pollution it is. Teach and asdents to master the new words “brethe” and “influnce”. Understand “soil”, “harmful” and “be harmful to”.
　　(2) Look and match. Finish 3a and check the answers.
　　(3) Finish 3b with the given word and phrases in 3a and check the answers.
　　2. Discuss in groups about the cause and harm of pollution. Then the teacher mammary: Pollution does harm to not only human beings but also animals. Lead to 2.
　　3. Listen to 2 and finish 2.
　　4. The teacher leads to 1a.
　　(1) Show the first picture in 1a and asdents to describe the beautiful scenery. Teach and asdents to master the new words “bee” and “stream”.
　　(2) Show the second picture in 1a and asdents to describe the changes caused by environmental pollution. Learn and master the new word “waste”.
　　Step 3 Consolidation
　　1. Asdents to read 1a, and deepen their understanding of the picture.
　　2. Let students read 1a aloud, and find out key phrases and sentences. Write them down on the Bb. Let students understand these sentences on the Bb and guess the meaning of “my googness”.
　　(1) Oh, my goodness.
　　(2) The flowers and grass have gone!
　　(3) Look, there are sever chemical factories pouring waste water into the stream.
　　3. Listen to 1a. Let students follow it and imitate the pronunciation and intonation.
　　4. Work in groups. Read 1a in groups of four, then act it out. Finish 1a.
　　Step 4 Practice
　　1. The teacher presents some sentences in 1a, and shows students how to change direct speech into indirect speech. Then let students practice in pairs.
　　2. Let students fill out the table in 1b, then learn the usage of direct speech and indirect speech. Remind students to pay attention to the change of the tense.
　　Step 5 Project/work after class