(共18张PPT)
Unit 13 We’re trying to save the earth!
Section A (3a-3b)
【Teaching Goals】
1.According to 3a on P99, master the important language points.
2.According to 3a-3b on P99, improve reading skills.
【Key Points & Difficult Points】
1. Key Points: Master the important language points.
2. Difficult Points: Improve reading skills.
Finish the words and phrases.
Words：
n.鲨鱼[ ɑ k]____________ n.鱼鳍[f n] ________
n.链子[t e n] _______n.生态系统[ i k s st m] ________
n.工业;行业 [ nd stri]__________ n.法律 [l ] _______
adj.adj.残酷的 [ kru l] ____ adj.有害的[ hɑ mfl] ______
科学的 [ sa n t f k] _______________
Phrases：对...有害_______________
在...顶部_____________
食物链__________________
shark
fin
cruel
harmful
chain
ecosystem
industry
law
scientific
be harmful to
at the top of
the food chain
What can you see in the video
What did people do to sharks
Warming-up
Why did people cut off sharks’ fins
The shark fin soup is made from shark fins ! ! !
Fast reading Listen to the passage and find the answer in 3a.
Without a fin, what will happen to a shark
Without a fin,a shark can on longer swim and slowly dies.
Careful reading
Para. 1
Many have heard of shark fin soup. This famous and expensive dish is especially popular in southern China. But do you realize that you’re killing a whole shark each time you enjoy a bowl of shark fin soup
1.Shark’s fin soup is famous and expensive all
around the world.
2.You’re killing a whole shark when you enjoy a bowl
of shark fin soup.
Judge the sentences and T or F
in southern China.
F
T
Para. 2
When people catch sharks, they cut off their fins and throw the shark back into the ocean. This is not only cruel but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean’s ecosystem. If their numbers drop too low, it will bring danger to all ocean life. Many believe that sharks can never be endangered because they are the strongest in their food chain. But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
1. How many sharks are caught and traded every year
2.What does the word “they” refer to in the first sentence
Para. 3
Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. They have even asked governments to develop laws to stop the sale of shark fins. So far, no scientific studies have shown that shark fins are good for health, so why eat them Help save the sharks!
1. Two environmental protection groups against “finning” are ______ and ______.
2. How can governments help to stop the sale of shark fins
World Wide Fund For Nature
Say “NO!” to shark fin soup.
No trade No murder
What can we do to help save sharks
1. Many people do not realize they are killing 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 ocean’s ecosystem will be in danger.
3. Many think that sharks are too strong to be endangered, _______
they are wrong.
Read the passage again and fill in the blanks with the words in the box.
when
so
but
3b
so although if but when
4. ________ 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 the sale of shark fins.
Although
if
so although if but when
【Explanation】
Many have heard of shark fin soup. This famous and expensive dish is especially popular in southern China. But do you realize [that you’re killing a whole shark (each time you enjoy a bowl of shark fin soup)] When people catch sharks, they cut off their fins and throw the shark back into the ocean. This is not only cruel, but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean’s ecosystem.
hear of=hear about听说
eg. I've never heard of/about such a story.
hear from 收到...的来信
eg. I look forward to hearing from you.
cruel adj. 残酷的 adv. cruelly
E.g. It’s cruel of you to treat the baby like that.
He killed the cat cruelly.
be cruel to 对...残忍
eg. We shouldn't be cruel to animals.
harmful adj. 有害的
E.g. Eating too much junk food is harmful to your health.
harm n. /v.伤害，损害
E.g.Eating too much junk food does harm to your health.
Smoking too much will harm our bodies.
at the top of 在...顶部或顶端
at the bottom of 在...底部
eg. He was standing at the top of the stairs, while his brother was sitting at the bottom of the stairs.
If their numbers drop too low, it will bring danger to all ocean life. Many believe [that sharks can never be endangered (because they are the strongest in their food chain)]. But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
fall by 下降了
eg. This year the price of TV falls by 20 percent.
fall to 下降到
eg. This year the price of TV falls to 2000 yuan.
Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. They have even asked governments to develop laws to stop the sale of shark's fins. So far, no scientific studies have shown (that shark's fins are good for health), so why eat them Help save the sharks!
scientific[ sa n t f k] adj. 科学上的，科学的
E.g. This study is not scientific.
science n. 科学 scientist n. 科学家
E.g. I like science and want to be a scientist.
hear of
cut off
no longer
not only … but also
be harmful to
bring danger to
the number of
so far
Find the phrases and match.
不再
割掉，砍掉
到目前为止
对……有害
给……带来危险
……的数量
听说
不但……而且……
1.My teacher has given me useful suggestions and I want to thank him from the _____ of my heart.
A. condition B. bottom C. way D. surface
2.Our country is taking actions to ________ air pollution.
A.cut down B.cut up C.cut out D.cut off
3.Don’t play games on the computer all day. It’s ________ to your eyes.
A. harmful B. useful C. helpful D.thankful
4.A number of visitors _______ visiting the West Lake and the number of the visitors _____ increasing.
are; is B. is; are C. are; are D.is;is
B
A
A
A
5．I've never heard ____the singer. Do you know much about her
A．with B．of C．on D．in
6．Not only his parents but also he ____ been to the United States.
A．have B．are C．is D．has
7．Please ____ the TV. It's time to go to bed.
A．turn on B．turn off C．put on D．put off
B
D
B
