1. UNIT 6 When was it invented?
Section B(1a—1e)
第 3 课 时

2. 学 习 目 标 学会运用描述食物味道的单词：crispy,sour,sweet,salty； 通过听说训练，了解薯条的发明历史；1
通过听说训练，了解薯条的发明历史； 2 3
学会用被动语态谈论薯条的发明历史。

3. 课 堂 导 入 sour sweet salty bitter
What are the four basic kinds of tastes?
sour
sweet
salty
bitter

4. potato chips salted duck egg
Can you name some food that are associated with the four tastes?
potato chips
salty
salted duck egg
salty
lemons
ice-cream
sour
sweet

5. The words in the box describe how food can taste
The words in the box describe how food can taste. Write them under the correct pictures. Some pictures have more than one word. 1a

6. sweet crispy salty sour
adj. 脆的；酥脆的
adj. 酸的
sweet crispy salty sour
adj. 咸的
crispy
sour
______ ______ ______ ______
______ ______ ______ ________
sweet
salty
salty
fresh
cold
delicious

7. Write the name of a different food after each word. 1b
sweet ____________________________
crispy ____________________________
salty ____________________________
sour ____________________________
apple
candy
banana
potato chips
cracker
cookie
Beijing Duck
salt
salted fish
grape
lemon

8. Look and guess:
What are they talking about?
Where does the story happen?

9. Listening 1c
Read the sentences, what are they talking about? Listen and circle T for true or F or false.
1. Potato chips were invented by mistake.
2. They were invented in 1863.
3. The customer thought the potatoes were not thin enough.
T F
n. 顾客

10. T F 4. The customer said they were not salty enough.
5. George wanted to make the customer happy.
6. The custom was happy in the end.
T F

11. What are needed? The potatoes are cut into slices.
The slices are cooked in the pan.
The pepper and tomatoes are sprinkled.

12. chef
potato chips
George Crum
Who were potato chips invented by?
When were potato chips invented?

13. Listen and answer the questions.
1. Who invented potato chips?
They were invented by a cook called George Crum.
2. When were they invented?
In 1853.
3. What did the custom order at the restaurant?
He ordered a plate of fried potatoes.

14. 4. What did the custom think of the potato chips George cooked at first?
He thought they were cut too thick.
5. How did George cook the potatoes then?
He cut the potatoes really, really thin and cooked them for a long time until they were crispy. And he put lots of salt on them so they were really salty.

15. Listen again. Complete the sentences. 1d
The History of Potato Chips
Do you know how potato chips were invented? Potato chips _____________ by a cook called George Crum. They were invented in ______.
were invented
1853

16. George Crum cut the potatoes really, really _______ and then cooked them for a long time until they were _______. Finally he put lots of salt on them so they were ___________.
thin
crispy
really salty

17. Listen to the tape again and pay attention to Passive voice (past tense).

19. We’ll see which group does the best.
Role-play 1e
1. Read the dialogue aloud for a few minutes by yourself;
2. Role play in groups;
3. Role play in front of the class.
We’ll see which group does the best.

20. 课 堂 达 标 根据句意及所给首字母提示，补全句中所缺单词。
1. Laura added too much salt to the soup.
Now it tastes too s
2. The potato chips are thin and c Please have a try.
3. Oranges taste sweet and a bit s and
they are full of vitamin C.
4. The main purpose of the advertisement is
making c spend money.
alty
rispy
our
ustomers

21. Homework 1. Preview the new words and expressions.
2. Preview the passage Do You Know
When Basketball Was Invented on
page 46.

22. Thank you !