文档介绍：Unit 9 When was it invented? Section B Period 1
按要求改写句子
1. People use pans for cooking . (改为被动语态)
Pans ____ ____ ____ cooking by people .
2. What do people use the pen to do ? (改为同义句)
What ____ the pen _____ _____ ______ by people?
3. Did the workers make cars in this factory in 1990 ?
(改为被动语态)
____ cars ______ by the workers in this factory in
1990 ?
4. The students don’t go to bed before the teacher comes back .
(改为同义句)
The students ______ go to bed _______ the teacher
comes back.
5. The telephone was invented in 1876 . (就划线部分提问)
_______ _______ the telephone __________?
6. He knew potato chips were invented by accident . (改为一般疑问句)
______ he ______ potato chips were invented by accident ?
are used for
is
used to do
Were
made
don’t
until
When was
invented
Did
know
crispy and salty
Describe how food tastes.
sour
sweet
sweet
Listening (2a, 2b: P71)
The potato chips were invented by
mistake.
2. They were invented in 1863.
3. The customer thought the potatoes weren’t thin enough.
T
F
T
4. The customer said they weren’t
salty enough.
5. George wanted to make the
customer happy.
6. The customer was happy in the
end.
T
F
F
_____________that potato chips were invented by mistake? Chips ______
_________by a chef called George Crum. They were invented in______. George Crum cooked them for a long time until they ___________And he sprinkled lots of salt on them so they were__________.
The history of chips
Did you know
were invented
1853
were crispy
really salty
Tapescript
Boy1: Hey, did you know that potato chips
were invented by mistake?
Boy2: Really? What do you mean?
Boy1: Well, here on the bag it says that
they were invented by a chef called
George Crum.
Boy2: When was that?
Boy1: Oh, it was back in 1853.
Boy2: So, why was it an accident?