(共17张PPT)
Unit
6
When
was
it
invented?
Section
B
(1a-1e)
Learning
Aims
To
understand
how
potato
chips
were
invented.
To
learn
the
words
and
expressions.
Passive
voice
(past
tense)
potato
chips
lemons
salted
duck
eggs
ice-cream
They
taste
different.
Pre-listening
How
does
the
food
taste?
They
are
crispy
and
salty.
/'krIsp?/
adj.
脆的；酥脆的
/
's?:lt?
/
adj.咸的
biscuits
salty
Beijing
Duck
How
does
the
food
taste?
sweet
How
does
the
food
taste?
sour
/
'sa??/
adj.
酸的；有酸味的
yogurt
hot（辣的）
balsam
pears
[?b??ls?m
pe?]
bitter
chilies
sweet
____________________________
crispy
____________________________
salty
____________________________
sour
____________________________
Write
the
name
of
a
different
food
after
each
word.
banana
apple
Beijing
Duck
potato
chips
grape
candy
cookie
cheese
salted
duck
egg
lemon
1b
Look
at
the
picture,
read
the
sentences
and
predict.
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
Prediction
What
are
they
talking
about?
And
where?
错误地；无意中
/
?k?st?m?(r)/
n.
顾客；客户
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
Listening
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
1d
Post-listening
A:
Do
you
like
potato
chips
??
A:
Do
you
know
who
were
potato
chips
invented
by?
A:
When
and
where
were
they
invented?
A:
How
were
they
invented?
A:
Why
was
it
a
mistake?
1e
Ask
and
answer
in
pairs.
They
were
invented
by
George
Crum.
They
were
invented
in
a
restaurant
in
1853.
They
were
invented
by
mistake.
The
customer
complained
the
fried
potatoes
were
too
thick.
When
they
were
sent
back
to
the
kitchen,
George
was
angry.
So
he
made
the
potatoes
really
thin,
crispy
and
really
salty.
He
thought
the
customer
would
hate
them,
but
he
loved
them
and
asked
for
more.
Yes,
I
like
them
very
much..
What
can
we
learn
from
the
story?
Do
you
want
to
be
an
inventor?
The
History
of
Potato
Chips
Who?
When?
How?
George
Crum
in
1853
ordered
fried
potatoes,
were
cut
too
thick,
were
sent
back,
cut
really
thin,
crispy,
salty,
hate,
loved
and
asked
for
more
Summary
1.
The
fruit
_____
_____
______.(味道不好)
2.
Were
the
sandwiches
not
_____
_______(足够薄）？
3.
The
potato
chips
are
______
_______.(足够脆）
4.The
potato
chips
were
invented_____
_____.
(无意中)
5.
You
have______
____
_____
______.(犯了一个愚蠢的错误）
6.
___
___
___(最后),
the
soup
was
made
___
___
_____(有点咸)
.
doesn't
taste
good
thin
enough
crispy
enough
by
mistake
made
a
foolish
mistake
In
the
end
a
little
salty
Exercises
Homework
Write
down
the
story
The
History
of
Potato
Chips
.
Finish
off
the
Wb.
exercises.
Review
2b.
