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1、九年级英语上册Unit 2 Saving the Earth Topic 2 All these problems are very serious.Section C学案（无答案） 【学习目标】：（课前预习）1.熟记本节单词P37,P38及短语:2.让我帮你理解课文。1). 我们所做的一些事情对地球有益，然而有一些对地球却有负面影响。Some things we _ _ are very _ _ the earth while some are bad.2). 下雨或刮风时，土壤被带走，森林变成了荒漠，因此越来越多种类的动植物正在灭绝。When it rains or when the _
2、_, the earth is _ _ forests _ _ deserts, so _ _ more _ _ animals and plants _ _. 3).大量来自太阳的有害射线穿过这个洞直接进入地球大气层。_ _ harmful _ _ the sun _ _ the hole and _ the earth _.4) 它会引起海平面的升高而且地球上的气候也会有变化。It causes _ _ _ the ocean _ _ and the _ _ the earth _ _.【重难点】：掌握不定代词的用法。【课堂活动】:一【预习检测】：1. 根据首字母及汉语提示完成句子。(1)
3、. The sun r_ in the east and sets in the west.(2). What do you think of the l_ of our living conditions ?- Just so so. I hope it will be better.(3).Tom is very tall w_ his father is very short.(4). Have you ever heard of _ _ _ (温室效应)?(5). She has _ _ (带走) her book.(6). Internet has changed our lives
4、 _ _ _ (在许多方面) 2.学生翻译下列句子，教师讲解。(1). But now air pollution is destroying it and that has made a very big hole in the ozone layer.(2).Carbon dioxide (CO2) in the air has increased a lot.(3). This has formed a blanket around the earth. (4). The heat from the sun cant escape so the temperature is rising
5、. This is called “the greenhouse effect”.二【自主探究】:三【题组训练】: （一）单项选择1.There are many leaves on the ground. When the wind comes, the leaves will be _. A. Taken up B. taken away C. taken to D. taken in 2. _ down trees harms the living conditions of human beings.A. Cut B. Cuts C. Cutting D. To cut 3. She
6、managed to escape _ the burning car. A. in B. from C. by D. to 4. As many factories have polluted the river, you can find _ fish on the water here and there.A. die B. death C. dead D. died 5. There are _ students on the ground, and five _ girls are in them.A. hundred; hundreds of B. hundreds of; hundredC. hundred; hundred D. hundreds of; hundreds 6. _ your hand if you know the answer.A. Rise B. Give C. Raise D. Put（二）、用所给词的适当形式填空.
