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1、Unit 13 Were trying to save the earth!Section A 2 (3a-3c)I. RevisionTranslation.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. Warming up 1. T: 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; T
2、ake 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. Discussion1. What do you know about shark(鲨鱼)?2. Do you think sharks can be endangered? Why?3. What do you think might cause a fa
3、ll in the number of sharks?IV. Reading1. Complete the fact sheet in 3a. Where shark fin soup is popularNumber of sharks caughtand traded every yearHow government can help Two environmental groups which are against “finning”2. Retell the passage. sharks fin soup, in southern China each time cut off n
4、o 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 studiesV. Practice (Work on 3b) Read the passage and fill in the blanks with the words in the box.1) Many people do not realize they are killi
5、ng 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 o
6、f 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.VI. 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”, 通常位于实义动词之前，助动词、情态动词或系动词之后。e.g. Mr Brown no longer works here.
7、 布朗先生不再在这里工作了。 = Mr Brown doesnt work here any longer/ any more.【运用】. 完成句子，每空一词。2013年3月，由于H7N9禽流感，白水鸭在南京不再受欢迎。White ducks are _ _ lovely in Nanjing because of H7N9 bird flu in March, 2013. (2013 新疆乌鲁木齐)no longer . 改为同义句。Joe no longer likes dancing. _Joe doesnt like dancing any longer/ any more.2. Th
8、is 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。1）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。Not only does my sister sing well, but she dances well.我姐姐不但歌唱得好，而且舞也跳得好。Not only the students but also the teacher is working hard.不仅学生们在努力，而且那位老师也在努力。
9、当not only置于句首时，常用_。 倒装语序not only. but also.连接两个主语时，谓语动词需与_那个主语在人称和数上保持一致。后面【运用】同义句转换，每空一词。(1)She and I have already been to Beijing. _ _ she _ _ I have already been to Beijing. Not only but also (2)He likes to swim and he wants to teach the kids to swim, too.Not only _ _ _ to swim, _ he wants to tea
10、ch the kids to swim. does he like but(3) The twins were late this morning. Sam was late this morning, too. Not only the twins _ _ Sam _ late this morning. but alsowas _ _ Sam but also the twins _ late this morning. Not onlywere 2) be harmful to 对 有害e.g. Smoking is harmful to the health. 吸烟有害健康。 Play
11、ing 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. 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 t
12、oo 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。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。当表示数值的高或低时，number要用_修饰。常与number搭配的动词有grow, fall等。high或 lowe.g. 近来拥有轿车的家庭数量增长很快。_The number of families that own cars has been growing quickly recently.HomeworkWrite 5 measures to protect the environment.