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二、Key and difficult points in Teaching：
1 the passive voice, modal verbs and used to sentence patterns.
2 Measures to protect the environment
三、procedure of teaching:
I.Lead in
T: How’s the weather?/What has the weather been like these days?
Ss: It’s cold,foggy,bad,awful……
T: Why?
Ss: Because the earth is polluted.
T: So we’re trying to save the earth!
II. Presentation
1Show students the pictures and talk about how the earth is polluted and why, and what we should do to solve it.
2.Discussion
Students discuss and finish 1a
III. Listening
1 Now Tony and Mark are talking about pollutions, let’s listen and find out what pollution is it, if they think the right way to solve it.
Listen and finish 1b
What was the problem?
The river was _____________. Even the bottom (底部) of the river was full of ________. There were no more ______ for fishermen (渔民) to catch.
What caused the problem?
People are throwing _______ into the river. Factories are putting ______ into the river.
How should the problem be solved?
We should write to the ____________ and ask them to ___________ the factories. Everyone should help to __________ the river.
IV. Show Time
1 T: I don’t think it’s enough. You’re not deeply moved. Now I’ll show you something. After watching, tell me your feeling.
Let students watch the MV.
2 Then ask them to draw small pictures to show their feeing and what they can do
to protect our earth.
V. Homework
Please make a poster and think of what we can do.