教学设计:

. Unit 13  We are trying to save the earth

Section 3a—3b  

【导学目标】

• 1.熟记本课词汇和短语，并能应用短语造句。

• 2.复习运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。

• 3.通过本文阅读，有环境危机意识，学会关注环境保护，保护临危动物。

【重、难点】.复习运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。

Lead-in

小组讨论：

1. Have you ever seen a shark（鲨鱼）?

2. What do you know  about sharks?

【预习导学】

1.读一读本课词汇：

 shark,fin,cruel,harmful,chain,ecosystem, industry, law, scientific,

be harmful to,  at the top (of  sth.), the food chain

2.译一译：

（1）. Without a fin , a shark can no longer swim and slowly dies.

（2）.Sharks are at the top of the food chain in the ocea’s ecosystem.

（3）. If their numbers drop too low, it will bring danger to all ocean life.

（4）. So far, no scientific studies have shown that shark fins are good for health,so why eat them?

【导学达标】

活动一：议一议（小组讨论）

读课文，判断正误（T或F）

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

3. People cut off sharks’ fins and throw the sharks back into the ocean.

4. Sharks are in the bottom of the food chain in the ocean’s ecosystem.

Read the third paragraph

5. WildAid and the WWF are environmental  protection groups in China.

6. Shark’s fins are good for health.

活动二：做一做：

再读一遍课文，完成3a和3b阅读练习。

（小组合作完成，展示答案）                                                                                 

合作探究：（学习以下短语）

shark fin soup       in southern China

each time               cut off     

no longer               not only…but also…         

at the top of      be endangered     the strongest     around 70 million     develop laws       scientific studies

【导学测评】

一、用动词的适当形式填空。

• 1) We’re trying _______ (save) the earth.

• 2) There used to_____ (be) clean and beautiful.

• 3) There are too many ______ for ________to catch (fish).

• 4) It’s bad for environment to use _________ (wood) chopsticks.

二、根据句意用take, spend, pay，cost的适当形式填空。

• 1) That new car ________ them lots of money.

• 2) Mona __________ 50 yuan on the books just now.

• 3) It usually _______ me an hour to do my homework.

• 4) You should __________ some time practising your pronunciation.

• 5) My brother _______ 6, 000 yuan for the new computer yesterday.