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(共20张PPT)
Section B 1a-1e
Unit 6 When was
it invented
Warming up
Do you eat snacks What snacks do you like to eat
Think-Pair-Share
sour sweet bitter spicy
crispy hard soft greasy
S1: What does ... taste like
S2: It tastes ...
What does it / do they taste like
What kind of food can you see in these pictures
potato chips
lemon
ice-cream
salted
eggs
Pre-listening
1a
The words in the box describe how food can taste. Write them under the correct pictures. Some pictures have more than one word.
sweet crispy salty sour
___________ ________ ______ ________
crispy
salty
sour
sweet
salty
Write the name of a different food after each word.
1b
sweet __________ crispy ___________
salty __________ sour ________
banana
fried chicken
salted eggs
lemon
1c Listen and circle T for true or F for false.
1. Potato chips were invented by mistake. T F
2. They were invented in 1863. T F
3. The customer thought the potatoes were not thin enough. T F
4. The customer said they were not salty enough. T F
5. George wanted to make the customer happy. T F
6. The customer was happy in the end. T F
1d Listen again Complete the sentences
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 ________. 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 ___________.
were invented
1853
thin
crispy
really salty
What are needed
The potatoes are cut into slices.
The slices are cooked in the pan.
The pepper and tomatoes are sprinkled.
potato chips
Who were potato chips invented by
When were potato chips invented
George Crum
chef
Boy 1: Hey, did you know that potato chips were invented by
mistake
Boy 2: Really What do you mean
Boy 1: Well, here on the bag it says that they were invented by a
cook called George Crum.
Boy 2: When was that
Boy 1: Oh, it was back in 1853.
Listen and read.
Boy 2: So, why was it an accident
Boy 1: Well, one day, a customer came into the restaurant where
George worked. He ordered a plate of fried potatoes. When the
potatoes came, he said they were cut too thick and sent them back to
the kitchen.
Boy 2: So what happened
Boy 1: Well, George was angry, so he cut the potatoes really, really
thin, and he cooked them for a long time until they were crispy.
And he put lots of salt on them so they were really salty. He thought
the customer would hate them.
Boy 2: And
Boy1: And the customer loved them and asked for more. He told the
other customers about them, and soon everyone was ordering thinly
cut, crispy, salty potato chips.
Boy 2: And we’re still eating them today.What a cool story!
Fill in the mind map, then retell.
The History of Potato Chips
When
Who
How
Result
Why
1853
George Crum
The customer said the fried potatoes were cut too thick and sent them back to the kitchen. George was angry.
1. Cut the potatoes really, really thin.
2. Cooked them for a long time until they were crispy.
3. Put lots of salt on them.
The customer loved them and asked for more.
1e Make a conversation about the invention of
potato chips. Use the information in 1c and 1d.
A: Did you know potato chips were invented by mistake
B: Wow, I didn’t know that. Who invented them
A:...
by mistake为介词短语，意为“无意中；错误地”,
相当于accidentally。
例句：
I missed the school bus by mistake this morning.
今天早上我无意中错过了校车。
I took your pen by mistake. 我错拿了你的钢笔。
Language Points
The customer thought the potatoes were not thin enough.
（教材P45）
enough修饰名词时不需要倒装。
e.g. There isn’t enough food left in the fridge.
冰箱里剩的食物不多了。
enough修饰形容词、副词时需要倒装。
e.g. He’s tall enough to change the bulb without getting on a chair.
他个头够高，不用踩椅子就可以换灯泡。
enough常可以和词组so ... that ...,too ... to ...转换。例如：
用enough
He didn’t run fast enough to catch up with the others.
用so ... that ...
He ran so slowly that he couldn’t catch up with the others.
用too ... to ...
He ran too slowly to catch up with the others.
The customer was happy in the end.（教材P45）
in the end的意思是“后来，最后，终于”，in the end用一个单词表达可以用finally，用一个短语表达可以用at last 。
e.g. He won in the end.
He won finally.
He won at last.
Exercises
用所给单词的正确形式填空。
1. The TV ____________ (invent) around 1927.
2. They are used for _______ (see) in the park.
3. This kite _________ (make) by Uncle Wang.
4. Tea plants ______________ (discover) a long time ago.
5. Our classroom _________________ (should clean) every day.
was invented
seeing
was made
was discovered
should be cleaned
选词填空
crispy sweet salty sour
1. I don’t like eating chocolate. The taste is too _______ .
2. Mom added salt but it still wasn’t ______ enough.
3. I prefer lemons to oranges. I like the ______ taste.
4. She likes _______ cookies. They are hard, dry and easily broken.
sweet
salty
sour
crispy

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