Unit 8 We’re trying to save the earth! Section A (3a—4c)课件(共19张PPT)

(共19张PPT)
Unit 8 We’re trying to save the earth!
Section A (3a—4c)
一、重点单词：cruel, harmful, industry, law, scientific, afford
二、重点短语：be harmful to, at the top of, take part in, turn off, pay for, take action
三、重点句型：
(1)This is not only cruel, but also harmful to the environment.
(2)But in fact, around 70 million sharks are caught and traded in this industry every year.
(3)So far, no scientific studies have shown that shark fins are good for health.
Warming up Look at the pictures and talk about something about sharks.
3a.Read the passage about sharks and complete the fact sheet below.
In southern China.
Around 70 million.
Over 90 percent.
WildAid and the WWF.
How government can help
Develop laws to stop the sale of shark
fins.
Save the Sharks!
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. 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.
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. 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.
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.
3b. Read the passage again and fill in the blanks with the words in the box.
so, although, if, but, when
when
so
but
Although
if
We’re trying to save the earth. Present progressive
The river used to be so clean. used to
The air is badly polluted. Passive voice
No scientific studies have shown that shark fins are good for health. Present perfect
We should help save the sharks. Modal verbs
Grammar Focus
Joe: ________you ever________ (take) part in an
environmental project
Ken: Yes, I have. I__________ (help) with a Clean-Up Day
last year. It was___________ (consider) the biggest
clean-up project this city________ ever________ (have).
Joe: How many people___________ (take) part
Ken: I ___________(think) more than 1,000 people
_________(come) to help out.
Joe: That’s fantastic! I guess everyone in this city is________
(try) to improve the environment.
Ken: Yes, we can’t afford to __________(wait) any longer to
take action!
Have
taken
think
helped
considered
has
had
took
came
trying
wait
4a.Fill in the blanks with the correct forms of the verbs in brackets.
People__________ think that big things ____________be done to
save the earth. Many forget that saving the earth begins with
small things. For example, you _________save electricity by
turning off the lights when you leave a room. You _________also
use reusable bags instead of plastic bags. I think it's a great idea
that you now _______pay for plastic bags in some stores. And
instead of driving to school or work, you________ ride your bike
or walk. If it’s far, you_________ take the bus. All these small
things _________add up and become big things that__________
improve the environment. Let's take action now!
can, would, could, have to, should, must, may/might
may/might
must/should
can
can/could
have to
could
can
should
would
4b. Fill in the blanks with the appropriate modal verbs from the box.
课堂小结
一、重点单词：cruel, harmful, industry, law, scientific, afford
二、重点短语：be harmful to, at the top of, take part in, turn off, pay for, take action
三、重点句型：
(1)This is not only cruel, but also harmful to the environment.
(2)But in fact, around 70 million sharks are caught and traded in this industry every year.
(3)So far, no scientific studies have shown that shark fins are good for health.
Guessing Game:
Can you guess what animals they are
1. They look like a cow, but they live in the water.
2 . They are furry enough to keep out the cold. They are all white and only live in the North Pole.
3. They are enormous and have long trunks.They live in Africa and Southeast Asia.
4. They only live in Australia and have pockets to keep their babies safe.
5. They look like monkeys but they are bigger than monkeys. They can imitate what people do.
6.They only live in China and eat bamboo.
7. They are shy, have red eyes, like eating carrots and can run fast.
9.They can learn to speak. They’re playful.
8. They are soft and have long bodies. They can “walk”quickly on the water without feet.
Do you think they are happy
Do you think zoos are good for animals
用所给词的适当形式填空
1.Plastic bags are _____(harm) to the ocean.
2.My sister can’t afford ____(buy) the car now.
3.She was chosen to take part in the _____(science) research.
4.You can also use ____(reuse) bags instead of plastic bags.
答案：1. harmful 2.to buy 3.scientific 4.reusable
达标训练
Homework
Read the passage about sharks again and try to retell the passage.
Doing is better than saying.
行胜于言。