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3．掌握以下重点短语：
(1).again and again.
(2). make a difference to
【教学准备】
幻灯片，录音机。
【教学过程】
Ⅰ．Lead-in
Watch a video.
1.T: Do you like your school? S: …
2．Present some pictures about pollution and learn the new words at the same time.
Ⅱ．Listening
Listen carefully and answer.
1. What do people waste most in Edmonton?
A. water B. paper C. energy
2. What points are mentioned in the lesson?
take short showers
recycle and sort
reuse plastic bags
ride bikes or take buses
turn off the lights
Ⅲ．Reading
Read the text then answer the questions.
1. Edmonton is a clean city. ( ) T / F
2. "We reuse our plastic bags" means that we use them _______________________.
3. A bike is _______ other types of transportation, because it doesn’t make any pollution.
4. Do buses make more pollution than cars?
5. In fact, if each of us makes a small change in our life, we can make a big difference to our
environment. (Translate the sentence.)
Ⅳ．Show the important knowledge points:
1. again and again.