1、Unit 2 Saving the Earth Topic 2 All these problems are very serious. Section C 制作：舒庄一中 修订人：郭红杰 九英上九英上 学习目标学习目标 1、学习并能说出、写出P3940的生词，并能 进行英汉互译 2、熟读1a，能够说出1a中重要的知识点，能 够熟练做题。 【 自学指导自学指导1】 1.自学内容：课本P3940的生词。 2.自学方法：先根据音标试读，同桌互相正 音，提问。 3.自学时间：5分钟 4.自学要求：会读，知道其汉语意思，并能 英汉互译。 【自学检测自学检测1 】 英译汉 hole_ form _ bl
2、anket _ escape _ rise _ take away _ the greenhouse effect _ refer to _ 【自学指导自学指导2 】 1.自学内容：课本39页1a 2.自学方法：听录音并扫读1a。 3.自学时间：8分钟 4.自学要求：完成1b; 和1c. 【自学检测自学检测2】 听录音完成1b 1b Read 1a and complete the following tasks. 2.What does our planet mean here? A. The sun. B. Mars. C. The moon. D. The earth. 3.In the
3、 passage, blanket refers to _. A. carbon dioxide around the earth B. the ozone layer in the sky C. the forests around the world D. pollution all over the world 4.The word it in Paragraph5 refers to _. A. CO2 B. O3 C. O2 D. H2O 5. What is the best title for this passage ? A.Environment Problems B. Po
4、llution on the Earth C. Hope for the Future D. The Greenhouse Effect Write down only the key words when taking notes. 1c Complete the notes according to 1a. 【自学检测自学检测2】 Problem Effect on the environment fewer trees forests become deserts, animals and plants disappear traffic pollution greenhouse eff
5、ect, level of oceans rising, climate change Retell it cars and buses pollute air, health problems pollute land and water, rivers and lakes dead harmful radiation reaches the earth, cause cancer factory pollution ozone hole more CO2 【自学指导自学指导3】 1.自学内容：课本39页1a 2.自学方法：精读 3.自学时间：10分钟 4.自学要求：能够说出1a中重要的知识
6、点 1a Read and understand. Choose suitable titles for Paragraphs 2-6. Then write it down in front of each paragraph. The earth is 4.6 billion years old. We humans have lived on the earth for only 35 000 years, but during this period, we have changed our planet a lot in many ways. Some things weve don
7、e are very good for the earth while some are bad. _ All over the world, people have cut down millions of trees. When it rains or when the wind blows, the earth is taken away. Forests have become deserts, so many kinds of animals and plants are disappearing. Fewer Trees A. Traffic pollution B. Factor
8、y pollution C. Fewer trees D. The ozone hole E. More carbon dioxide _ In big cities, cars and buses have polluted the air. Now many people in cities have health problems. _Factories have also polluted the land and the water. As a result, many rivers and lakes are now dead. _ Around the earth, theres
9、 a special kind of oxygen called “ozone”(O3). It is important to the earth. But now air pollution is destroying it and making a very big hole in the ozone layer. Too much harmful radiation from the sun passes through the hole and reaches the earth directly. This is very dangerous because this kind o
10、f radiation can cause cancer. Traffic Pollution Factory Pollution The Ozone Layer 直接地直接地 _ Carbon dioxide (CO2) in the air has increased a lot. It mainly comes from burning oil, coal and wood. This has formed a blanket around the earth. The heat from the sun cant escape so the temperature is rising.
11、 This is called “the greenhouse effect”. It causes the level of the oceans to rise and the climate of the earth to change. All these problems are very serious, so we must do something now. More Carbon Dioxide 1.Some things weve done are very good for the earth while some are bad Some things weve don
12、e -定语从句定语从句 我们已经做过的 事情,在句子中作主语， while 并列连词，“而，却”，表示对照关系。 2.When it rains or when the wind blows the earth is taken away.take away 拿走，取走, 句子中是被动语态 3.The heat from the sun cant escape so the temperature is rising.rise - 升起，上升 (不及物动词) 拓展：拓展：raise 举起，提起，抬起 ； 筹集 (及物动词) 要要 点点 归归 纳纳 【自学检测自学检测3】 翻译下面的句子 1.我
13、们所做的一些事情对地球有益，而其他的一些对地 球有害。 _ 2.当刮风下雨的时候，土就会被刮走或冲走。 _ 3.来自太阳的热量不能散发，所以气温升高 _ 4.所有这些问题都非常严重，因此我们现在必须采取措 施。 _ 5.结果，现在许多河流湖泊已经没有了生机 _ Some things weve done are very good for the earth while some are bad. When it rains or when the wind blows, the earth is taken away. The heat from the sun cant escape so
14、 the temperature is rising. All these problems are very serious, so we must do something now. As a result, many rivers and lakes are now dead. (1)_ of us knows how to stop the bad behavior. (2) I knocked on the door but _ answered. (3) Some of these books are better than_. (4) She was driving the ca
15、r with one hand and wiping the window with the _. (5) They are beautiful but I am looking for _ useful. (6) Is there _ you can do to help her? (7) Therere 5 000 people living here and almost _has his/her own car. (8) Hes cleverer than _ I know. (9) Ive looked _ but I cant find it. Fill in the blanks
16、 using something, anything, others, nobody, everyone, anybody, everywhere, none, other. None nobody others other something anything everyone anybody everywhere 【当堂训练当堂训练 】 We learn: 1. Some words: hole, form, rise 2. Some phrases: take away, refer to 3. Some sentences: All these problems are very serious, so we must do something now. We can: 1. Talk about the harm of pollution. 2. Combine the key points to form a short passage.
