Unit 13 We’re trying to save the earth!（5课时学案，含答案）

Unit 13 We’re trying to save the earth!
第1课时 Section A 1a～2d
听录音或根据音标朗读词汇表中P.97～P.98：litter～make a difference共11个词。并在课文中划出来。
二、根据汉语写出下列短语，并在课文中划出来。
1 拯救地球 9 大量的黑烟
2 大声的音乐 10 太多的垃圾和废物
3 噪音污染 11 在公众场合
4 河流底部 12 变成丑陋的地方
5 参与 13 减弱空气污染
6 废物污染 14 木头筷子
7 被严重污染 15 塑料叉子
8 燃烧煤块 16 创造一个更好的未来
自主探究
1. But it used to be so clean! 但是它过去是如此的干净！
【解读1】used to do意 ( http: / / www.21cnjy.com )思为过去常常做某事，是表达一般过去时态，它的一般疑问句句型为：Did +主语+use to do 常与其混淆的结构有：be used to do/for doing(被用于做某事), be/get used to doing(习惯于做某事)。
【举例】I used to be able to see stars in the sky. 我过去常常能在天空中看到星星。
Knives are used to ( http: / / www.21cnjy.com )cut things./ Knives are used for cutting things 刀是用于切东西的。
On school days, he is used to getting up early. 在上学的日子，他习惯于早起。
【解读2】so clean意思为如此的干净 ( http: / / www.21cnjy.com )。so和such 都有“如此的，这样的”意思，区别是：so后接形容词，而such修饰名词。例如：so beautiful a girl(如此漂亮的一个女孩)such a beautiful girl(如此漂亮的一个女孩） 但形容词表示多少时，一般用so, 如so many books(如此多的书)。
【练习】根据中文完成句子
（1）你过去常常留长发吗？ you have long hair
（2）这个老人习惯于住在农村了。
The old man in the countryside.
（3）教室里的那台电脑室用来查找信息的，而不是用来给你们玩游戏的。
The comp ( http: / / www.21cnjy.com )uter in our classroom search for information, but it isn’t playing computer games for you.
（4）用这么少的金钱购买这么贵重的一件东西是多么不可能啊！
It’s impossible to buy a expensive thing with little money!
第2课时 Section A 3a～4c
一、听录音或根据音标朗读词汇表中P.99～P.100：shark～transportation共14个词。并在课文中划出来。
二、根据汉语写出下列短语，并在课文中划出来。
1 听说 10 不再
2 鱼翅 11 不仅...而且...
3 一整条鲨鱼 12 食物链
4 一碗 13 在海洋生态系统中
5 捕捉鲨鱼 14 在过去的二三十年里
6 切除 15 更新法律法规
7 扔回到海洋 16 科学的研究
8 没有了鱼鳍 17 到目前为止
9 对...有害 18 对健康有益
自主探究
This method is no ( http: / / www.21cnjy.com )t only cruel, but also harmful to the environment. 这种方法不仅残酷，而且对环境是有害的。
【解读】not only... but （also）... 意思为不仅...而且...，在句中常用来连接两个对等的成分，also可以省略。not only... but (also)... 用来连接两个主语时，谓语动词的单、复数遵循“就近原则”，即和but (also)后的名词或代词的数一致。同时，not only... but (also)... 连接两个分句，当not only位于句首，前一个分句常用倒装来表示强调，而but (also)后的分句仍用陈述语序。
【举例】She speaks English not only in class but (also) at home.
她在课堂上和家里都说英语。
Not only her parents b ( http: / / www.21cnjy.com )ut also she is fond of watching football matches.
不仅她的父母，而且她都喜欢看足球比赛。
Not only does the sun give us light but also it gives us heat.
太阳不仅给我们光还给予我们热。
【练习】选择题
(1) Not only but repair it.
A. can he; ( http: / / www.21cnjy.com )he can B.he can; can he C.can he ; can he D.he can; he can
(2) Not only Li Ming but I students.
A. is B. are C. am D. be
2. So far, n ( http: / / www.21cnjy.com )o scientific studies have shown that shark’s fins are good for health, so why eat them 到目前为止，没有科学的研究已显示鱼翅对健康是有益的，所以为什么要吃它们呢？
【解读1】此句中用到的是现在完成时态， ( http: / / www.21cnjy.com )其结构为：主语 + have/has + done. 此句型中的have/has为助动词，其否定形式为haven’t/ hasn’t. 常与其连用的时间状语有：so far; in the last/past few years; since then; for some years...
【举例】I have taught English here since then. 自从那时起我就一直在这教英语。
I haven’t heard from her these days. 这些日子我没有收到她的信。
They have been away for two years. 他们离开已经两年了。
The number ( http: / / www.21cnjy.com )s of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years. 在过去的20到30年里一些种类的鲨鱼数量已经减少了90%多。
【解读2】be good ( http: / / www.21cnjy.com )for 意思为对...有好处，有益。常与其混淆的结构有：be good at（擅长于...）; be good with( 善于与...打交道、对...有办法); be good to(对...友好)
【举例】Running is good for our body. 跑步对我们的身体有好处。
I am good at running. 我擅长于跑步。
Tony is goo ( http: / / www.21cnjy.com )d with his classmates, so they all like him. Tony 善于和他的同学打交道，所以他们都很喜欢他。
We like o ( http: / / www.21cnjy.com )ur English teacher, because she is good to us. 我们喜欢我们的英语老师，因为她对我们很友好。
【练习】选择题
(1) The famous writer _____ one new book in the past two year.
A. is writing B. was writing C. wrote D. has written
(2)—Our country ______ a lot so far. —Yes. I hope it will be even ______.
A. has changed ； well B. changed ； good
C. has changed ； better D. changed ； better
(3) The Smiths _______ in China for 8 years.
A. has lived B. lived C. have been D. live
(4) My friend w ( http: / / www.21cnjy.com )as good me when I was ill. She told me that eating more vegetables is good my health.
A. with; for B. to; for C. with; to D. for; with
(5) Li Mei is interested in drawing. Also, she is good it.
A. with B. to C. at D. for
第3课时 Section B 1a～1e
一、听录音或根据音标朗读词汇表中P.101：recycle～napkin共2个词。并在课文中划出来。
二、根据汉语写出下列短语，并在课文中划出来。
1 停止开车 5 使用纸巾
2 再利用书本和纸张 6 做...很难
3 关掉灯 7 带上你自己的袋子
4 洗头 8 停止做...
自主探究
1. I stopped using them last year. 去年我就停止使用他们了。
【解读1】此句子的时态为一般过 ( http: / / www.21cnjy.com )去时态，常与其连用的时间状语有：yesterday/ last week/ last month/ last year/ …ago…
【举例】He waited for you here three hours ago.三个小时以前他在这里等你。
【解读2】stopped为stop的过去式 ( http: / / www.21cnjy.com )。在英语当中动词的过去式分为规则变化和不规则的变化，不规则动词总数大概不过200多个，但是使用频率很高。主要分成三类：
1、第一类不规则动词的三种形式同形，如：cost cost cost/ cut cut cut/ hurt hurt hurt
2、第二类不规则动词的过去式 ( http: / / www.21cnjy.com )和过去分词同形，如：bring brought brought/ catch caught caught/ lead led led
3、第三类不规则动词的原形、过去式和 ( http: / / www.21cnjy.com )过去分词都不相同，如：begin began begun/ break broke broken/ grow grew grown/ ring rang rung/ wake woke / waked woken
此外还有少数不规则动词的过去分词与原形 ( http: / / www.21cnjy.com )相同，如：come came come/ become became become/ run ran run
【练习】用所给动词的适当形式填空
（1）Tom and Mary ___________ (come) to China last month.
（2）Mike (not go) to bed until 12 o’clock last night.
（3）Mary __________ (read) English yesterday morning.
（4）There _________ (be) no one here a moment ago.
第4课时 Section B 2a～2e
听录音或根据音标朗读词汇表中P.102～P.103：upside down～creativity共7个词。并在课文中划出来。
二、根据汉语写出下列短语，并在课文中划出来。
1 扔掉 10 擅长回收
2 不再需要 11 开一家小店
3 投入更好的使用 12 建立一个网站
4 有一个有创造力的头脑 13 在网上出售
5 推倒 14 使用旧物的新方法
6 倒转、颠倒 15 因为…而出名
7 由…制作而成 16 …的重要性
8 旧的玻璃瓶 17 带来快乐
9 获奖 18 一点创造力
自主探究
1. She lives in a ho ( http: / / www.21cnjy.com )use in the UK that she built herself out of rubbish. 她住在英国的一幢房子里，这幢房子是她自己亲手用垃圾建造的。
【解读1】句子中that she built ( http: / / www.21cnjy.com ) herself out of rubbish 是用来修饰 house 的，我们称它为定语从句。当先行词为物体时，关系代词用that/which；当先行词为人时，关系代词用that/ who。
【举例】（1）He is the man that I saw yesterday. 他就是我昨天见的那个人。
（2）The bag that you are carrying is my mother’s. 你正拿着的包是我妈妈的。
【解读2】build out of…意思为用…建造。
【举例】They built a boat out of wood. 他们用木头造了一条船。
【练习】选择题
（1）The girl __________ an English song in the next room is Tom’s sister.
A. who is singing B. is singing C. sang D. was singing
（2）Can you lend me the novel __________ the other day
A. that you talked B. you talked about it
C. which you talked with D. you talked about
翻译句子。
（3）你应该用石头建造一个房子。
You should your house stones.
（4）很多日常生活用品是塑料制的。
Many things in daily life are plastic.
Not only can the ar ( http: / / www.21cnjy.com )t bring happiness to others, but it also shows that even cold, hard iron can be brought back to life with a little creativity. 艺术不仅能给大家带来快乐， 而且它也展示了：只要带有一点创造力，甚至冰冷坚硬的铁块也能被唤起活力。
【解读1】not only... but ( http: / / www.21cnjy.com ) (also)... 连接两个分句，当not only位于句首，前一个分句常用倒装来表示强调，而but (also)后的分句仍用陈述语序。这就是句中can 提前的原因。
【举例】（1）Not only is this young man clever but also he is hardworking.
这个年轻人不仅聪明而且还很勤奋。
（2）Not only did ( http: / / www.21cnjy.com )he speak English correctly，but also he speaks it fluently.
他不仅说英语说得很标准，而且还流利。
【解读2】bring back to life意思是复活，给予活力。
【举例】（1）Can bring flowers back to life 可以让花起死回生？
（2）Anyway he was dead; we couldn't bring him back to life. ( javascript:;" \o "机器发音 )
反正他死了，我们不能使他复生。
【解读3】creativity意思为创造力，独创力，词性为名词。其动词为create(创造); 形容词为creative(有创造力的).
【举例】（1）God created the world. 上帝创造了世界。
（2）Creative people often have some creative thinking.
有创造力的人通常会发挥一些有创造力的思维。
（3）I regard creativity both as a gift and as a skill.
( javascript:;" \o "机器发音 )我认为创造力既是一种天赋也是一种技巧。
【练习】选择题
（1）Not only Miss Li like music, but (also) she sports.
A. /; likes B. does; likes C. does; like D. is; like
（2）On the one hand, we need .
A. create B. creative C. creativity D. created
第5课时 Section B 3a～self check
一、根据汉语写出下列短语，并在课文中划出来。
1 不够美丽 5 看到许多变化
2 需要被改善 6 更多地乘坐公共交通工具
3 环境问题 7 被工厂污染
4 解决问题的方法 8 变得越来越糟糕
自主探究
1.The river is polluted by factories.这条河流被工厂污染了。
【解读】句中is polluted 为被动语态。被动语态由“be＋及物动词 ( http: / / zhidao. / search word=%E5%8F%8A%E7%89%A9%E5%8A%A8%E8%AF%8D&fr=qb_search_exp&ie=utf8" \t "_blank )的过去分词”构成。人称、数和时态的变化是通过be的变化表现出来的。现以teach为例说明被动语态在各种时态中的构成。一般现在时 ( http: / / www.21cnjy.com" \o "欢迎登陆21世纪教育网" \t "_blank )：am／is／are＋taught 一般过去时 ( http: / / www.21cnjy.com" \o "欢迎登陆21世纪教育网" \t "_blank )：was／were＋taught 一般将来时 ( http: / / www.21cnjy.com" \o "欢迎登陆21世纪教育网" \t "_blank )：will／shall be＋taught 现在进行时 ( http: / / www.21cnjy.com" \o "欢迎登陆21世纪教育网" \t "_blank )：am／is／are being＋taught 现在完成时 ( http: / / www.21cnjy.com" \o "欢迎登陆21世纪教育网" \t "_blank )：have／has been＋taught
【举例】（1）The window is broken by Mike.窗户是迈克打破的。
（2）Some new computers were stolen last night. 一些新电脑在昨晚被盗了。
（3）This book will be finished reading by him.这本书将要被他读完。
（4）The classroom is being cleaned by the students. 教师正在被学生们打扫。
（5）The radio has been repaired. 收音机已经被修好了。
【练习】选择题
（1）The Olympic Games ___________every four years.
A. are held B. were held C. are holding D. will ho1d
（2）Usually computers _________to search the Internet.
A. use B. are using C. are used D. used
（3）It is reported ( http: / / www.21cnjy.com )that more new teaching buildings _______ in our school in the
next term.
A. will be built B. was built C. has built D. will build
（4）Don’t discuss th ( http: / / www.21cnjy.com )e problems with your partner unless you _________ to do so.
A. ask B. are asked C. will ask D. will be asked
（编写：胡佳 审核：吕伊璐）
Unit 13 We’re trying to save the earth!
第1课时 Section A 1a～2d
二、短语理解
1. save the e ( http: / / www.21cnjy.com )arth 2. loud music 3. noise pollution 4. the bottom of the river
5. play a part in 6. ( http: / / www.21cnjy.com ) waste pollution 7. be badly polluted 8. burn coal
9. a lot of black smoke 10. too much rubbish and waste
11. in public places ( http: / / www.21cnjy.com )12. turn into ugly places 13. cut down air pollution
14. wooden chopsticks ( http: / / www.21cnjy.com )15. plastic forks 16. lead to a better future
自主探究
1. (1) Did use ( http: / / www.21cnjy.com ) to (2) is used to living (3) is used to; used for (4) so; such; so
第2课时 Section A 3a～4c
二、短语理解
1. hear of 2. shark’s fin 3. a whole shark 4. a bowl of
5. catch sharks ( http: / / www.21cnjy.com ) 6. cut off 7. throw back into the ocean 8. without a fin
9. be harmful to 10. ( http: / / www.21cnjy.com )no longer 11. not only… but ( also)… 12. the food chain
13. in the ocean’s ecosystem 14. in the last 20 or 30 years
15. develop laws 16 ( http: / / www.21cnjy.com ). scientific studies 17. so far 18. be good for health
自主探究
1. (1) A (2) C 2. (1) D (2) C (3) C (4) B (5) C
第3课时 Section B 1a～1e
二、短语理解
1. stop riding in ( http: / / www.21cnjy.com ) cars 2.recycle books and paper 3. turn off the lights 4. wash your hair
5. use paper nap ( http: / / www.21cnjy.com )kins 6. It’s hard to… 7. take your own bags 8. stop doing
自主探究
（1）came （2）didn’t go （3）read （4）was
第4课时 Section B 2a～2e
二、短语理解
1.throw away 2. no ( http: / / www.21cnjy.com )t need anymore 3. put to good use 4. have a creative mind
5. pull down 6. upside down 7. be made of 8. old glass bottles
9. win a prize 1 ( http: / / www.21cnjy.com )0. be good at recycling 11. open a small shop 12. set up a website
13. sell online 1 ( http: / / www.21cnjy.com )4. new ways to use old clothes 15. be known for
16. the importance ( http: / / www.21cnjy.com )of 17. bring happiness
18. a little creativity
自主探究
1. （1）A （2）D 2. （1）build；out of （2）built out of 3.（1）B （2）C
第5课时 Section B 3a～self check
一、短语理解
1. less nice ( http: / / www.21cnjy.com ) 2. need to be improved 3. environmental problems
4. ways to solve ( http: / / www.21cnjy.com )the problems 5. see many changes 6. take public transportation more 7. be polluted by factories 8. get worse and worse
自主探究
（1）A （2）C （3）A （4）B