Section A 2 (3a-3c)I. Revision(1) Role-play 2d.(2) Translate these sentences into English.甚至是河底都满是垃圾。这个小镇上的每个人都应该参加打扫。骑自行车有其它的优点。我买外卖食品从来不拿木筷子和塑料叉子。II. Lead in (1) Teacher tells students the earth is badly polluted. What should we do to save the earth? Lets take action. For example: Turn off the lights when you leave a room; Take buses instead of driving carsRecycle books and paper.(2) There are some animals are endangered. We should do something to protect the animals and the environment! III. Discussion (1) Have you ever seen a shark?(2) What do you know about sharks? IV. Reading(1) Sharks are endangered, read the passage and judge the sentences.Sharks fin（鱼鳍）soup is famous and expensive all around the world.We have to kill a whole shark to get a bowl of sharks fin soup.People cut off sharks fins and throw the sharks back into the ocean.Sharks are in the bottom of the food chain in the oceans ecosystem.WildAid and the WWF are environmental protection groups in China.Sharks fin s are good for health.(2) Complete the fact sheet in 3a. Where shark fin soup is popularNumber of sharks caughtand traded every yearHow much the numbers of some kinds of sharks have fallen in the last 20 to 30yearsTwo environmental groups which are against “finning”V. Practice (3b) (1) Read the passage and dill in the blanks with the words in the box.1. Many people do not realize they are killing a whole shark _ they enjoy a bowl of shark fin soup.2. Sharks are at the top of the food chain, _ if their numbers drop, the oceans ecosystem will be in danger.3. Many think that sharks are too strong to be endangered, _ they are wrong.4. _ there are no scientific studies to support this, a lot of people believe that shark fins are good for health.5. Sharks may disappear one day _ we do not do something to stop the sale of shark fins. (2) Retell the passage according to the words below.sharks fin soup, in southern China each time cut off no longer not onlybut also at the top drop be endangered the strongest around 70 million fallen by over 90 percent WildAid and the WWF develop laws scientific studiesVI. Language points1. A shark can no longer swim and slowly dies. 鲨鱼不能再游泳然后慢慢死掉。no longer意思是“不再” e.g. Im no longer a student. 我不再是个学生了。 有两个短语和no longer同义，即notany longer和notany more，但他们侧重的方面不同。no longer和notany longer侧重时间。 e.g. He no longer lives here.= He doesnt live here any longer. 他不在这儿居住了。(一个时间以前他住在这儿，过了这个时间，他就离开了。) notany more侧重侧重程度和数量e.g. You can drink no more. = You cant drink any more. 你不能再喝了。(喝酒的量到了一定程度，不能再继续下去了。) 2. This method is not only cruel, but also harmful to the environment. 这种方法不但残忍而且对环境有害。not onlybut also用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅而且”; 其中的also有时可以省略。e.g. 1) She not only plays well, but also writes music. 她不仅很会演奏，而且还会作曲。 2) Not only men but also women were chosen. 不仅仅是男的，女的也有被选中的。 若连接两个成分作主语，其谓语通常与靠近的主语保持一致。e.g. Not only you but also he has to leave. 不只是你，他也得离开。 not only放在句首，后接句子时要用倒装结构。 e.g. Not only had the poor man been fined, but also he had been sent to prison. 这个可怜的人不仅被罚款，而且还被送进了监狱。 be harmful to 对 有害e.g. Smoking is harmful to the health. 吸烟有损健康。 Playing computer games much is harmful to students. 电脑游戏玩太多对学生有害。3. Sharks are at the top of the food chain in the oceans ecosystem. 鲨鱼位于海洋生物系统食物链的顶部。at the top of 在.最高地位; 用最高最大的(速度, 声音等) e.g. I looked at the top of his head, his hair shiny and parted smoothly. 我看他的头顶, 头发光亮, 分得平滑。 He shouted at the top of his voice in order that he might be heard. 他尽力大声叫喊, 以便别人能听见。4. If their numbers drop too low, it will bring danger to all ocean life. 如果它们的数目降至过低，会给所有海洋生物带来危险。此句复数形式的number表达全海洋中鲨鱼的总量。当表示数值的高或低时，number要用high或low修饰。e.g. In that country, the number of children going to school is higher in cities than in towns and village.在那个国家，城市儿童入学人数比乡镇及农村要高。常与number搭配的动词有grow, fall等。e.g. The number of families that own cars has been growing quickly recently. 近来拥有轿车的家庭数量增长很快。5. Environment protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. 世界各地的环境保护组织，如野生救援协会和世界自然基金会，都在教育公众有关“猎翅”的行为。1) 句中fin本为名词，指 “鱼鳍”。此句中的finning由动词化的fin（割鲨鱼鳍以获取鱼翅）的-ing形式转化而成，指课文中所陈述的 “猎翅”这一行为。2) WildAid和WWF组织WildAid（美国野生救援协会）是保护野生动物及栖息地环境的一个非盈利性的机构，1999年注册成立，其宗旨是保护及救助世界范围内的野生动物；WWF（世界自然基金会）英文全称为World Wide Fund for Nature，成立于1961年，是享有国际盛誉，全球最大的独立性非政府环境保护组织之一。VII. HomeworkWrite 5 measures to protect the environment.