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3.学生两极分化情况较严重,对后进生需要加强辅导。
三、重点难点
1.理解短文含义。
2.能熟练运用There be....句型,should和shouldn't进行日常对话。
四、教学活动
（一）导入
1.Greetings
2.Watch the video: The Earth
3.Free talk:
T:We all live on the earth.We do everything on the earth.We go to school,go home,have meals and sleep on the earth.It is our home.So the earth is our "mother earth".We should care for our "mother earth".We should love it.
（二）新授
Paragraph 1
1.Listen to the DVD carefully and answer the question.
Q1: What's on the earth?
2.Answer the question and use "There be..."
3.Let's read the first paragraph.
Paragraph 2
1.出示被破坏的地球,提问 What happened on the earth?
T: The earth is ill. Beacuse people do bad things to it.
2.Listen to the DVD carefully and answer the question.
Q2: What do people do bad?
3.Answer the qustion and review the words: cut down trees,waste water,make the air clean
Q3:What else do people do bad on the earth?
Answer the qustion and review the words:pick flowers, kill animals
4.Let's read
a.学生朗读第二段前两句话,熟悉句型,理解含义。
b.全班齐读后两句,理解含义。
c.师生问答:
T:Should we cut down trees?
Ss:No,we shouldn't.