1、Unit 13We are trying to save the earth.,Section A 3a-3b,Factories pour dangerous gases into the air. Factories produce too much dangerous smoke. Cars also pour dangerous gases into the air. The traffic produces too many fumes. Some people smoke in public places.,Air pollution,Natural resources are d
2、isappearing at a dangerous rate.,以危险的速度,Natural resources,desert,Water pollution,serious pollution,We are harming our planet in so many ways.,伤害,air pollution,soil pollution,water pollution,close down the factories;help to clean up the river; take the bus or subway;ride a bike;bring a bag to go shop
3、ping,throw rubbish in the cans; turn off the lights when you leave a room;use paper or resusable bags;recycle books and paper; turn off the shower when you wash your hair;dont use napkins;rethink,reuse, recycle . .,solutions,鲨鱼Shark,鲨鱼，生活在海洋中，是海洋中最凶猛的鱼类。鲨鱼早在恐龙出现前三亿年前就已经存在地球上，至今已超过五亿年，它们在近一亿年来几乎没有改变。
4、鲨鱼，在古代叫作鲛、鲛鲨、沙鱼，是海洋中的庞然大物，所以号称“海中狼”。还有鲸鲨，大白鲨。目前因为有大多数人认为鲨鱼的软骨（即鱼翅）中蛋白质很高，但这是错误的。鸡蛋的蛋白质远远超过鱼翅。因为人类错误的观念，鲨鱼几十年来被大量猎杀，专家分析再这样下去，鲨鱼将绝种，请保护好鲨鱼。吃鱼翅是可以的，但也对人体有害，因为鲨鱼翅中含有一定量的神经毒素。,Read the passage about sharks and complete the fact sheet below.,3a,Lets learn some,language points,harmful 形容词，意为“有害的”。常构成短语be
5、harmful to “对有害的”。Staying up often is harmful to your health. 经常熬夜对你的健康有害。【拓展】harm 名词，意为“害处”。常用构成短语do harm to “对有害”，相当于be harmful to. Too much smoking does harm to his health. = Too much smoking is harmful to his health. 吸烟过多对他的健康有害。,改为同义句。Reading in the sun does harm to our eyes. Reading in the sun
6、 _ _ _ our eyes.,is harmful to,辨析：join, join in 和take part in,to,1. Have you _ a club? Yes, Im in a swimming club and I often _ the swimming training. A. joined; take part in B. joined; join C. taken part in; join D. taken part in; join in 2. Were going for a picnic. Would you like to_ us? Why not?
7、Lets go! A. attendB. join C. join inD. take part in, afford是动词，意为“买得起,担负得起”，通常与can, could, be able to连用,多用于否定句中。They couldnt afford $50 for a ticket. 他们拿不出50美元买一张票。 afford后面常跟带to的动词不定式。We cant afford to go abroad this summer. 今年夏天我们没有足够的钱出国。Miss Taylor never wastes money on anything too expensive, e
8、ven though she can _to. She has donated much of the money she saved to charities. A. affordB. allow C. remind D. pay,Lets do this to review the text !,Some people like to eat sharks fin soup, especially in _China. But getting the s harks fin is very _. When people catch sharks, they _ _their fins an
9、d throw the sharks into the ocean. The shark slowly dies because it cant _ without the fin. And it is also _ to environment. Sharks are at the _ of the food chain. If the number of sharks drops too low, it will break the balance of nuture. Please say no to eating the shark fin soup, and take action
10、to save the sharks!,southern cruel cut off swim harmful top,1. Many people do not realize they are killing a whole shark _they enjoy a bowl of sharks fin soup.2. Sharks are at the top of the food chain, _if their numbersdrop, the oceans ecosystem will be in danger.,Read the passage again and fill in
11、 the blanks with the words in the box.,so,when,3b,Many think that sharks are too strong to be endangered, _ they are wrong. _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
12、the sale of shark fins.,but,Although,If,练习题,用方框中词的适当形式完成下面的句子。(1) I think its _ to make such a young boy work all day. (2)The poor fisherman cant _ his childrens education. (3) I think the government must develop _ to protect environment. (4) Eating too much junk food is _ to your health. (5) He can
13、 use different _ to work out the problem.,cruel,afford,law,harmful,method,II. 单项选择。1. Are you going to _ any of the events? Yes. Maybe long jump and high jump. A. take part inB. joinC. attend D. join in 2. I cant afford _ him an expensive birthday present. A. to buyB. buyingC. for buyingD. buy 3. Re
14、member to _ the lights when you leave the room. OK. I will. A. turn onB. turn downC. turn upD. turn off,4. The girl always has some money to _ snacks. A. spendB. pay forC. takeD. cost 5. Look! _ boys are playing on the playground. Yes. _ them is about 200. A. A number of; The number of B. The number
15、 of; The number of C. The number of; a number of D. A number of; A number of,III. 根据汉语提示完成句子。1. 我们必须采取行动来阻止他们。 We must _ _ to stop them. 2. 我从没听说过这个人。 I have never _ _ such a man. 3. 我们乐意尽力帮你摆脱困境。 We are glad to do what we can do _ _ _.4. 到目前为止，我已经交了二十个朋友。 _ _, I have made twenty friends. 5. 实际上，她从没
16、去过那儿。 _ _, she has never been there.,In fact,take action,heard of,to help out,So far,Homework,.Review the new words and expressions.Practice the passage in 3a.Write an eassy about our environment.,Thank You!,the earth song by Michael Jackson !,U盘、电脑坏了？教学资料不见了？以前的资料没保存？每一届重复劳动？找不到精品课件、试题、教案反思？各大文库价格昂贵？来【163文库】吧，你可以：上传分享资料赚取零用钱；创建教学空间，分类收藏存储资料；方便下届使用；百万教学资源供你下载；【平台地址：】,
