When was it invented? The second period

Unit 9

3a PAIRWORKMake a list of five helpful inventions and five annoying inventions.

Helpful inventions Annoying inventionsexample telephone1. __________2. __________3. __________4. __________5. __________

example alarm clock 1. __________2. __________3. __________4. __________5. __________

vacuum cleaner

television

car

computer

fax machine air-conditioner

truckhair dryer

junk food

ice cream

Explanation:1. annoying adj. 讨厌的 , 恼人的 ( 往往指事物 )

My father is annoyed with me.爸爸在生我的气。

e.g.

annoyed adj. 生气的 , 恼怒的 ( 往往指人 )

Electric hair dryer is an annoying invention.电吹风是个讨厌的发明物。

e.g.

2. helpful adj. 有用的，有帮助的e.g.Computer is very helpful in modern society.电脑在当今社会非常有用。

Model 1

A: What is this?B: It is an alarm clock. A: What is it used for?B: It is used for waking people up in the morning.A: Do you think it is annoying?B: Sometimes, when I want to go on sleep.

Model 2

A: What is this? B: It is a light bulb. A: What is it used for?B: It is used for giving light.A: Do you think it is helpful?B: Yes, I think so. Because I always do homework and read books in the evening by its light.

Model 3

A: What is this?B: It is a microwave oven. A: What is it used for?B: It is used for heating cold food and cooking meals.A: Do you think it is helpful?B: Yes, I think so. Because my parents are very busy and I can use it to cook meals by myself.

A: What do you think is the most helpful invention?B: I think the most helpful invention is the vacuum

cleaner. A: Why is that?B: Well, it can help me clean the floor when mother

asks me to do the cleaning.

3b PAIRWORKDiscuss your opinion in activity 3a with your partner.

Model 1

A: What do you think is the most annoying invention?

B: I think the most annoying invention is the air-conditioner.

A: Why is that?B: Well, I feel uncomfortable in the room with

an air-conditioner.

Model 2

4 GROUPWORKChoose five inventions you would like to have if you are alone on an island.

A: I’d like to have a radio because I could listen to music all day.

B: Yes, but that’s not going to help you leave the island. I think it would be better to have …

Model 1

A: I’d like to have some matches because I could light a fire to keep warm.

B: Yes, but that’s not going to help you leave the island. I think it would be better to have a cell phone.

Model 2

A: I’d like to have a telescope because I could look far.B: Yes, but that’s not going to help you leave

the island. I think it would be better to have a signal lamp.

Model 3

Exercise

1. The TV ___________ (invent) around 1927.

2. They are used for ______ (see) in the park.

3. This kite _________ (make) by Uncle Wang.

4. Tea _____________ (discover) a long time ago.

5. Our classroom ________________ (should clean) every day.

was inventedseeing

was made

was discovered

should be cleaned

II. 用所给动词的适当形式填空：

1. ______ ____ the computer ________ ( 什么时候发明的 )？2. ____ was the car ________ ___ ( 谁发明的 )

？3. A pen ___ ____ ____(用来做 ) writing.

4. What do you think is ____ _____ _______ _________ (最有帮助的发明 )？5. He said the fish was ____ ______ ( 足够咸 )

。

When was

is used for

invention the most helpful

salty enough

Who invented by

invented

III. 根据汉语完成句子：

HOMEWORK 1.Continue finding out some useful and annoying inventions. 2.Preview Section B 1a / 1b.