人教版九年级全册Unit13 We're trying to save the earth! Section A (3a～3b)课件(共30张PPT)

(共30张PPT)
Unit 13 We're trying to save the earth!
第二课时 Section A (3a～3b)
目录
01
02
名师点拨
课前预习
04
课堂小测
05
课后作业
03
语篇理解
课前预习
1. 鲨鱼 n. __________________
2. (鱼)鳍 n. ____________________
3.残酷的；残忍的 adj. ___________________
4. 有害的 adj. ____________________
核心单词
shark
fin
cruel
harmful
5.链子；链条 n. ___________________
6.生态系统 n. _________________
7. 工业；行业 n. ________________
8. 法律；法规 n. _________________
9. 科学上的；科学的 adj. _________________
chain
ecosystem
industry
law
scientific
10. 对……有害 ___________________
11. 在……顶部或顶端 __________________
12. 食物链 ______________________
13.……的数量 ______________________
常考短语
be harmful to
at the top of
the food chain
the number of
14. 这不仅残酷，而且对环境有害。
This is ______________ cruel, ______________ harmful to the environment.
15.但事实上，每年大约有七千万条鲨鱼被捕杀和交易。
But ______________, around 70 million sharks __________________________ in this industry every year.
典型句子
not only
but also
in fact
are caught and traded
名师点拨
be harmful to意为“对……有害”。harmful是形容词，意为“有害的”。如：
It's harmful to your eyes to read in the bus. 在公交车上看书对你的眼睛有害。
4
be harmful to的用法
【拓展】
1. harm是harmful的名词形式，意为“伤害”，表示“人的心理、健康或事业上的损害”，程度较轻。常用搭配：do harm to对……有害。如：
Excessive drinking did harm to his health. 过量饮酒损害了他的健康。
2. harm也可作动词，意为“伤害”。如：
Smoking harms our health. 吸烟危害我们的健康。
( )1. Staying up late often _______ your health.
A. do harm to B. is harm to
C. is harmful to D. does harmful to
( )2. Playing mobile phone much _______ your eyes.
A. does harm to B. is harm to
C. does harmful to D. harm
专 练
C
A
一、阅读教材P99-3a的课文，选出下列各题的最佳选项
( )1. If a shark doesn't have the _______, it can't swim anymore and slowly dies.
A. eyes B. ears
C. fin D. nose
C
语篇理解
( )2.Many people believe that sharks can never be endangered for the reason that _______.
A. they are the biggest in the ecosystem
B. they are at the bottom of the food chain
C. they are the strongest in their food chain
D. they are the strongest in the ecosystem
C
( )3. The writer of the passage wants to ask people to _______.
A. sell shark fins
B. eat less shark fin soup
C. catch the sharks
D. save the sharks
D
二、再仔细阅读课文，回答下列问题
1. How many sharks are killed when we enjoy a bowl of shark fin soup
___________________________________________________
A whole shark is killed. / A whole shark.
2. What will happen if the sharks' numbers drop too low
___________________________________________________
3.Which two environmental protection groups are mentioned in the passage
___________________________________________________
___________________________________________________
It will bring danger to all ocean life.
WildAid and the WWF are mentioned in the passage. / WildAid and the WWF.
三、本课时主要短语串联应用（用方框内所给短语的适当形式填空）
at the bottom of, pay for, play a part in, cut down, develop laws,
harmful to, so far, bring danger to, be in danger, a number of
Nature is our home. If we don't cherish or protect it, we'll have to 1. _______________ our indifference(冷漠).
Where I come from, there used to be miles and miles of wild forests when I was young. Sadly, in the past 20 years,
2. _______________ big trees have been 3. __________ by people who want to make a fortune(发财). This is not only selfish but also 4. _________________ the environment. Now,
pay for
a number of
cut down
harmful to
many mountains in my hometown have become less lively and many wild animals 5. ____________________ for having no food to eat or no places to live in. Old residents(居民) in our village used to see a few South China tigers live in the deep woods, but now no more. I remember seeing giant salamanders
(娃娃鱼) in the lake 6.___________________ the highest mountain, yet what's left is only the memory now. What's worse,
are in danger
at the bottom of
with the constant dropping of trees' numbers, the surrounding earth has been blown away by wind，which 7. _____________ residents who live at the bottom of the mountains. The price is so high. Can we really afford to pay for it？
brings danger to
Luckily, more and more villagers have realized this danger. And 8. _______, the local government has 9. ______________
against the random(随意的) tree-cutting. And many residents 10. ________________ tree-planting activities in spring.
For a better environment and a more beautiful world, please take action now！
so far
developed laws
play a part in
一、用所给单词的适当形式填空
1. That scientist has spent all his time doing ______________ (science) studies.
2. Many countries made ______________ (law) to stop smoking in public places.
课堂小测
scientific
laws
3.The development of space science has influenced many ___________________ (industry).
4. The poor workers were often made to work more than 16. hours a day by the ______________ (cruelty) boss.
5.Too much drinking is ______________ (harm) to health.
industries
cruel
harmful
二、找出下列句子的错误，并将错误部分在横线上进
行更正
6.There is a tower in the top of the hill.
____________________________________
7. The food chains shows the order that animals eat each other in a community.
____________________________________
in改为at
chains改为chain
8. Not only her parents but also she are fond of watching football matches.
______________________________________
9. We're trying to save the endanger birds.
______________________________________
10. The number of students in our class are 5.0.
______________________________________
are改为is
endanger改为endangered
are改为is
三、单项填空
( )11. Trees used to _______ for cooking by villagers in the 1970s.
A. cut off B. be cut off
C. be cut down D. cut down
C
( )12. Paul is a foreign teacher in our school. So far, he _______ for over four years.
A. was teaching B. will teach
C. taught D. has taught
D
( )13.—Have you ever heard _______ Mr. White, your new English teacher
—Yes, just a little. He's very friendly.
A. of B. from
C. out D. for
A
( )14. —Hey, you kid! Take care not to _______ the buds (芽).
—Sorry, I'll be careful.
A. get off B. cut off
C. set off D. put off
B
( )15.Stop making so much noise. It is _______ to the sleeping children.
A. comfortable B. relaxed
C. harmful D. useful
C
课后作业
此部分习题详见独立装订的《课后作业》。请同学们完成《课后作业》Unit 13 第二课时的练习题。
THANKS!