Unit 8 We're trying to save the earth Section B(3a-Self Check)学案（含答案）

课题：Unit 8 We’re trying to save the earth!
第四课时 Section B (3a-Self check)
学习目标：
1、重点词组
have a nice environment有一个好的环境； need to be improved 需要被改善；get worse and worse 变得越来越糟糕
2、重点句式
(1).The river used to be so clean.河流过去如此干净。
(2).We have seen many changes in the environment.在环境方面我们已经看到了许多变化。
(3).People should take public transportation more.人们应该更多地乘坐公共交通。
(4).The river is polluted by factories.河流被工厂污染。
(5).The air pollution is getting worse and worse.大气污染正变得越来越糟糕。
重难点：
1).3b的写作训练；
2).熟练掌握一般现在时、情态动词、被动语态、used to的用法和现在完成时；
3).掌握基本的构词法
4).环境保护的措施及相关写作任务。
导学设计：
本单元的话题是“保护环境，拯救地球”，意在唤起人们对环境、资源等方面问题的重视。在写此类文章时，应该理顺写作思路，首先描述当前恶化的环境问题；然后分析造成这种现状的原因，从而突出采取行动的必要性；最后将重心放在采取什么样的行动上来。作为环保类的文章，要特别注意真情实感及语言的号召力。所以审题必须仔细，构思必须严密。注意句式的变化，避免一种句式用到底的情况。
本单元出现的写作句型有：
①即使河底都充满垃圾。______________________________________
②城里的每个人都应当尽一份力把它清理干净。__________________
③空气被严重污染因为如今路上的汽车太多了。___________________
④为了减少空气污染，我们应当乘坐公汽或地铁而不是开车。
_______________________________________________
⑤我过去能在天空中看到星星。____________________
⑥这儿的空气真的已经被污染了，我非常担心。____________________
⑦没有科学研究说明鱼鳍对人们的健康有好处。__________________
⑧许多人忘记了拯救地球要从小事做起。_______________________
⑨我们真不应当使用纸巾。___________________________________
⑩让我们现在就采取行动吧！_________________________________
知识巩固:
用所给词的正确形式填空
1.You should know the (important) of learning.
2. (ride) bikes with my friends in the countryside last weekend was very exciting and relaxing.
3.We are all tired. Let's stop (have) a rest.
4.Parents should (education) their children to protect the environment.
5.The bridge is famous. It (build) thousands of years ago.
Ⅱ.选用方框中的短语，并用其正确形式填空
be harmful to,at the top of,take part in,pay for,pull…down
1.My old house ____________ last week,we will build a new house.
2.None of us ____________ the football game.
3.You broke down my mobile phone,you should ________ it.
4.You can see the whole city __________ the tower.
5.Reading in the sun ____________ our eyes.
Ⅲ.单项选择
1.The river _____ be clean,but now it’s _____.
A.used to;polluting B.used to;polluted
C.is used to;polluting D.is used to;polluted
2.Amy plays a part _____.
A.to recycle B.in recycle
C.in recycling D.on recycling
3.Can you take a bus ______ riding a bike
A.rather than B.than C.instead of D.instead
4.Traveling ______ me too much money.
A.spends B.takes C.pays D.costs
5.Noise pollution _______ hearing loss（失去）.
A.causes to B.leads to
C.is harmful to D.is good for
Ⅳ.根据汉语意思完成句子，每空一词
1. 买东西时，请你带自己的袋子。
Please your own bags when .
2. 别扔掉你不再需要的东西，有些很有用。
Don't things you don't need . Some of them are very useful.
3. 每天我们都应该好好利用我们的空闲时间。
Our free time should good use every day.
4.上个月她创建了一个网站，在网上卖衣服。
She a website to sell clothes last month.
5.比尔计划写一本书来向人们表明环保的重要性。
Bill plans a book to show people the of environmental .
Ⅴ.从方框中选择恰当的单词补全短文（有两项多余）
but If used which who it them pollutes grow another down faster
It’s very important that we all recycle. In nature, everything is__1_ again. For example, when an animal dies，it becomes __2__ animal's food. Nothing is wasted. But humans have created things like plastic bags __3__ can't be broken down by nature. Our rubbish kills animals and __4__ water and soil.__5__ we continue making too much rubbish, the problem will only get worse. If nature can't reuse the rubbish, we must recycle __6__.We should clean up the rubbish we've made because nature can't.
Recycling is also the right thing to do for another reason. The earth is rich in natural materials like water and trees, __7__ these materials are not endless. We use up our natural materials much __8__ than the earth is able to reproduce them. For example, each year we cut __9__ more than 6,000 square miles of forest. But it takes an average of 25 years for a new tree to__10_.
Recycling can help us save the earth, so let's take action right now.
参考答案
导学设计
① Even the bottom of the river was full of rubbish.
② Everyone in town should play a part in cleaning it up.
③ The air is badly polluted because there are too many cars on the road these days.
④To cut down air pollution, we should take the bus or subway instead of driving.
⑤ I used to be able to see stars in the sky.
⑥The air has become really polluted around here. I’m getting very worried.
⑦No scientific studies have shown that shark fins are good for health.
⑧Many forget that saving the earth begins with small things.
⑨We really shouldn’t use paper napkins.
⑩Let’s take action now!
知识巩固
Ⅰ.1.importance 2.Riding 3.to have 4.educate 5.was built
Ⅱ.1.was pulled down 2.took part in 3.pay for 4.at the top 5.is harmful to
Ⅲ.1-5 BCCDB
Ⅳ.1.take, shopping 2.throw away, anymore 3.be put to 4.set up, online 5.to write, importance, protection
Ⅴ.1.used 2.another 3.which 4.pollutes 5.If 6.it 7.but 8.faster 9.down 10.grow