Period 2 3a-3c

Section A

Unit 13 We’re trying to save the earth.

单项填空。1.I think we will play______ Class one this afternoon.A ． about B ． in C ． to

D ． against 2.Your bedroom is too dirty. Please ________.A ． clean it up B ． clean up it C ． set it up D ． put it up3.The boy stayed at home all day _____ going to school last term.A ． instead B ． instead of C ． take place of D ． take the place of

D

A

B

Test yourself

完成句子，每空一词。1．电在我们日常生活中起着重要作用。Electricity______ an important _____ in our daily life.2．你的抽屉真是一片混乱，你介意清除一下吗？Your drawer is really a mess.Would you mind _______ ____ ___ ？3．要是你忙的话，就改日再来吧。If you are busy, you may come another day ________. 4．我们必须减少水的用量。We must ______ _____ ____ the amount of water we use.5．昨天晚上我们县城的电被切断了。Electricity was ______ _____ in our town last night.

plays part

cleaning

It up

instead

cut down on

cut off

sharkfin

cruelharmful

be harmful toat the top of

chainthe food chain

ecosystemindustry

lawscientific

n. 鲨鱼n. （鱼）鳍adj. 残酷的；残忍的adj. 有害的对 ...... 有害的在 ...... 顶部或顶端n. 链子；链条食物链n. 生态系统n. 工业；行业n. 法律；法规adj. 科学上的；科学的

Words Review

The earth is badly polluted.

What should we do to save the earth?

Let’s take action ( 采取行动 )

Turn off the lights when you leave a room.

Recycle books and paper.

Take buses instead of driving cars.

There are some animals are endangered.

We should do something to protect the

animals and the environment!

The zoos provide homes for many

endangered animals. provide sth. for sb.=provide sb. with sth. 提供某人某物

offer sth. to sb.=offer sb. sth.

1. Have you ever seen

a shark （鲨鱼） ?

2. What do you know

about sharks?

1. Where do sharks live? __________________________________2. Are they all very big? ___________________________________3. What do they eat? ___________________________________4. Is the number of sharks decreasing? ___________________________________5. Why do people catch them? ___________________________________

What do you know about sharks?

In the sea.

Yes, it is.

To cut off their fins.

Yes, they are.

Fishes.

3a

Para. 1

Para. 2

Para. 3

Bad things happen when people cut off sharks’ fins.

Environmental protection groups have done things to protect sharks.

You’re killing a whole shark when you enjoy a bowl of shark fin soup.

速读文章，找出段落大意。

southern China70 million

over 90 percent WildAid and the WWF

Sharks are endangered, read the passage and judge the sentences.

Read the first paragraph

1. Shark’s fin （鱼鳍） soup is famous and

expensive all around the world.2. We have to kill a whole shark to get a

bowl of shark’s fin soup.

×

√

Read the second paragraph

1. People cut off sharks’ fins and throw

the sharks back into the ocean.

2. Sharks are in the bottom of the food chain

in the ocean’s ecosystem.

√

×n. 生态系统

食物链

Read Paragraph 2 and fill in the chart.

people enjoy _____________________

fishermen ___________, ___________, then _______________________

________________________________decreased quickly

a bowl of shark fin soup

catch sharks cut off their finsthrow them into the ocean

The numbers of some kinds of sharks

仔细阅读第二段，完成下面的句子。 Bad things happen to sharks when people cut off their fins.When people catch sharks, they _______ their fins and _______ the shark _______ into the ocean. Without a fin, a shark can no longer ________ and slowly _______. If sharks’ numbers ________ too low, it will ________ danger to all ocean life.

Task 2

cut offthrow back

swim dies

drop bring

Read the third paragraph

1. Wild Aid and the WWF are environmental

protection groups in China.

2. Shark’s fins are good for health. ×

×

仔细阅读第三段，完成下面的句子。 Some things that environmental protection groups have done:They __________ the public about "finning". They have even asked governments _____________ to stop the sale of shark fins.

Task 3

are teaching

to develop laws

Read the passage again and fill in the blanks with the words in the box.

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.

so although if but when

whenso

but

if

Although

3b

Let's do this to review the text !!!• Some people like to eat shark's fin soup,

especially in _______China. But getting the

• shark's fin is very _____. When people catch sharks, they ____ ____their fins and throw the sharks into the ocean. The shark slowly dies because it can't _____ without the fin. And it is also ______ to environment. Sharks are at the ____ of the food chain. If the number of sharks drops too low, it will break the balance of nuture. Please say no to eating the shark fin soup, and take action to save the sharks!

southern cruel cut off swim harmful top

Check if you know these phrases.

1. 把垃圾扔到河里

2. 在…中起作用3. 在中国南部

4. 对……有害5. 在……顶部

6. 海洋生态系统

throw the rubbish into the river

play a part inin southern China

be harmful to/do harm to…

at the top of

the ocean’s ecosystem

1) not only … but also … 用于连接两个表示并列关系的成分，着重强调后者，意为 _________ ；可与both ... and… 替换。若连接两个成分作主语，其谓语通常与 _________ 保持一致。Other examples:Not only does he speak fluent English, but he can also speak Chinese and French well.Exercise is not only good for health, but also fun.

This is not only cruel, but also harmful to the environment.

不仅而且

相近的主语

这种方法不但残忍而且对环境有害。

be harmful to 对……有害e.g. Smoking is harmful to the health.

吸烟有害健康。 Playing computer games much is

harmful to students.

电脑游戏玩太多对学生有害。

3. Sharks are at the top of the food chain in

the ocean’s ecosystem.

鲨鱼位于海洋生物系统食物链的顶部。at the top of 在……最高地位 ; 用最高 [ 最大 ] 的( 速度 , 声音等 )

e.g. I looked at the top of his head, his hair

shiny and parted smoothly.

我看他的头顶 , 头发闪亮且平滑的分开。He shouted at the top of his voice in order that he

might be heard.

他尽力大声叫喊 , 以便别人能听见。

The number of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.

2) a number of 与 the number of 的用法：the number of 意为“… 的数量”，跟复数名词连用作主语时，中心词是 number ，谓语动词用单数。 a number of 意为“许多”，相当于 many ，修饰可数名词复数。作主语时，谓语动词用复数。 number 前可用 large ， small 等修饰，以表示程度。练习：选词填空：the number of, a number of 1. ______________ teachers in our school is 350. 2. ______________ teachers like to read books.

The number ofA number of

I.用方框中词的适当形式完成下面的句子。

(1)I think it’s ____ to make such a young boy work all day. (2)The poor fisherman can’t _____ his children’s

education. (3) I think the government must develop _____ to

protect environment. (4) Eating too much junk food is _______ your health. (5) He can use different _______ to work out the problem.

method, cruel, harmful, afford, law

cruel

afford

law

harmful

method

II. 单项选择。1. —Are you going to _____ any of the events? —Yes. Maybe long jump and high jump. A. take part in B. join

C. attend D. join in 2. I can’t afford ____ him an expensive birthday present.

A. to buy B. buying C. for buying D. buy 3. —Remember to ____ the lights when you leave the room. —OK. I will.

A. turn on B. turn downC. turn up D. turn off

4. The girl always has some money to ___ snacks. A. spend B. pay forC. take D. cost

5. —Look! _____ boys are playing on the playground. —Yes. _____ them is about 200.

A. The number of; A number of B. The number of; The number of C. A number of; the number of D. A number of; A number of

III. 根据汉语提示完成句子。1. 我们必须采取行动来阻止他们。 We must _____ ______ to stop them. 2. 我从没听说过这个人。 I have never ____ ____ such a man. 3. 我们乐意尽力帮你摆脱困境。 We are glad to do what we can do ___ ___ ___.4. 到目前为止，我已经交了二十个朋友。 ____ ____, I have made twenty friends. 5. 实际上，她从没去过那儿。 ____ ____, she has never been there. In fact

take action

heard of

to help out

So far

Translate and write them down.1.甚至是河底都满是垃圾。

2. 这个方法不仅残酷还对环境有害。

3. 鲨鱼处于海洋食物链的顶部。

Even the bottom of the river was full of rubbish. .

This is not only cruel, but also harmful to the environment.

Sharks are at the top of the food chain in the ocean’s ecosystem.

3 After you After you readread

Retell the passage according to the words below.

shark’s fin soup; in southern China;each time; cut off; no longer; not only…but also…; at the top; drop; be endangered; the strongest;

around 70 million; fallen; by over 90 percent; WildAid and the WWF; develop laws; scientific studies

Summarize the article and discuss it with your partner.

sharks

hear of … is popular … realize … enjoy …

cut off … throw … back into …not only … but also …

at the top of be endangered

are caught and tradedthe number of

such as … teach about …develop laws … are good for

1. Review the new words and expressions you’ve learned today.

2. Read the articles in Learning English.

3. Write 5 measures to protect the environment.

4. Preview the new words and expressions.5. Preview the Grammar Focus on page 4.