(共23张PPT)
Unit
2
Saving
the
Earth
Topic
3
What
can
we
do
at
home
to
protect
the
environment?
Section
B
课前小测
一、用and,
but,
so,
or,
then填空。
1.
They
are
happy
they
share
their
happiness
with
others.
2.
Hurry
up,
you'll
miss
the
plane.
3.
I
like
chocolate,
it
is
bad
for
teeth.
4.
I
wanted
to
know
the
answer,
I
went
to
ask
him.
5.
He
had
a
drink,
went
to
bed.
课前小测
二、单选。
1.
Be
careful,
you'll
fall
off
the
bike.
A.
but
B.
and
C.
so
D.
or
2.
My
aunt
doesn't
have
much
money,
she
always
enjoys
herself.
A.
but
B.
and
C.
or
D.
so
3.
I
can't
understand
this
passage
there
are
no
new
words
in
it.
A.
if
B.because
C.
though
D.
and
4.
The
computer
cost
too
much,
it's
really
useful.
A.
so
B.
but
C.
and
D.
or
5.
That
was
our
first
lesson,
she
didn't
know
all
our
name.
A.
for
B.
but
C.
so
D.
or
We
won't
have
a
society
if
we
destroy
the
environment.
－Margaret
Mead,
American
anthropologist
Only
to
obey
nature
in
order
to
overcome
nature.
－Charles
Darwin,
English
naturalist
Lead
in
Share
some
mottos
If
we
destroy
the
environment
and
disobey
the
nature,
what
will
happen
to
us?
3
Read
the
passage
and
fill
in
the
blanks
with
the
correct
words.
Then
listen
and
check.
The
first
letter
of
each
word
is
given.
The
earth
is
our
home.
Some
things
we
have
done
are
good
for
the
earth
w_____
some
are
bad.
We
have
polluted
the
earth,
a______
it
is
sick
now.
We
c_____
down
too
many
trees,
so
lots
of
rich
land
has
c_______
into
desert.
Factories
p____
waste
water
into
rivers.
Pollution
has
caused
many
s_______
problems.
The
earth
is
crying
for
help.
What
shall
we
do
to
save
it?
We
should
plant
more
trees,
r_________
the
waste
we
produce,
r_________
the
waste
paper
and
soft
drink
cans,
and
ride
bikes
to
reduce
air
pollution.
I
think
we
should
try
to
be
g_________
people
to
protect
our
earth.
After
all,
we
have
only
one
earth.
We
should
do
e_________
to
protect
it,
or
we’ll
be
punished
and
lose
our
home.
hile
nd
ut
hanged
our
erious
educe
ecycle
reener
verything
Pre-listening
reuse
reduce
recycle
others
How
do
you
sort
the
garbage
you’ve
collected
on
your
own
Clean-up
Day.
Group
work
plastic
bottles...
paper
bags
and
cups...
lunch
boxes
soft
drink
cans,
plastic
bottles,
waste
paper,
glass,
paper
bags
and
cups
...
batteries
...
What
can
you
do
if
you
would
like
to
be
a
greener
person?
1b
Listen
to
1a
and
choose
the
correct
answers.
1.Jane
and
Michael
are
mainly
talking
about
_______.
why
we
should
shut
off
the
electricity
when
we
leave
what
we
should
use
when
we
go
shopping
how
to
be
a
greener
person
2.
Actions
speak
louder
than
words
means
____.
words
are
not
as
loud
as
actions
to
do
well
is
better
than
to
say
well
actions
can
speak,
but
words
can’t
do
it
While-listening
Task
1
Actions
speak
louder
than
words.
Remember
some
English
idioms
and
try
to
use
them
often.
Easier
said
than
done.
说起来容易做起来难。
行动胜于言辞。
1c
Read
1a
and
complete
the
table.
To
be
a
greener
person
1._______________________________when
you
leave
the
room.
2.
If
you
travel
a
short
__________,
you
shouldn’t
_________________
,
but
________________.
So
this
helps
to
___________
and
_________________.
3.
When
you
go
shopping,
you’d
better
______________
instead
of
using
_____________.
You
ought
to
shut
off
the
electricity
distance
take
a
bus
or
a
taxi
walk
or
ride
a
bike
save
energy
reduce
air
pollution
take
a
cloth
bag
plastic
bags
Retell
it
Task
2
You
should
/ought
to
…
shut
off
the
electricity
n.电，电能
关闭
e.g.
You
should
/
ought
to
shut
off
the
electricity
when
you
leave
a
room.
Language
Points
Task
3
ought
to
应该
ought
to
+
V原
ought
not
to
+
V原
You
should/ought
to
ride
a
bike
to
your
school.
You
should/ought
to
take
a
bus
to
school
instead
of
taking
a
taxi.
You
should/ought
to
take
a
cloth
bag
when
you
go
shopping.
Language
Points
Language
Points
First,
you
should
shut
off
the
electricity…
turn
off：关掉
shut
off：（机器）停住不工作，关掉（机器）；切断（水，
煤气或电）
turn
up：（把音量）调高，开大
turn
down：（把音量）调低，关小
Post-listening
Dicuss:
what
else
can
you
do
to
be
a
greener
person?
Reduce
waste.
Don’t
buy
cups
or
boxes
which
can
be
used
only
once.
Save
electricity.
Shut
off
the
electricity
when
you
are
not
using
it.
Task
1
Recycle
boxes
and
plastic
bottles.
Grow
fruit
and
vegetables
yourself.
Try
to
ride
a
bike
when
you
travel.
Use
both
sides
of
the
paper.
Cover
pans
when
you
are
cooking.
2
Choose
the
correct
verbs
or
phrases
to
complete
the
statements.
Then
match
them
with
the
right
pictures.
shut
off
reduce
grow
recycle
ride
cover
use
______
waste.
Don’t
buy
cups
or
boxes
which
can
be
used
only
once.
Save
electricity.
________
the
electricity
when
you
are
not
using
it.
________
boxes
and
plastic
bottles.
________
fruit
and
vegetables
yourself.
Try
to
________
a
bike
when
you
travel.
_________
both
sides
of
the
paper.
__________
pans
when
you
are
cooking.
Reduce
Shut
off
Recycle
Grow
ride
Use
Cover
1
2
3
4
5
6
7
Task
2
4
Work
in
groups
and
survey
your
group
members
about
what
they
do
to
be
greener
people.
Then
report
it
to
your
class.
Pay
attention
to
the
stress,
liaison,
incomplete
plosion
and
intonation.
Example:
A:
`Wha(t)
do
you
`often
`do
to
be
a
`greener
person
?
B:
Well.
`I
`always
`shut
off
the
electricity
when
I
`am
not
`using
it
.
A:
`Good.
`What
about
you
,
`John?
C:…
Task
3
We
Learn
We
can
Summary
1.
Some
words:
action,
distance,
electricity
2.
Some
phrases:
ought
to,
shut
off,
after
all
3.
Some
useful
sentences:
(1)Would
you
like
to
be
a
greener
person?
(2)First,
you
ought
to
turn
off
the
lights
when
you
leave
a
room.
(3)Easier
said
than
done.
(4)Well,
actions
speak
louder
than
words.
1.
Use
the
proper
ways
to
protect
the
environment
in
our
life.
2.
Talk
about
the
greener
life
style.
Exercises
1.
You
______
______(应该)
throw
the
rubbish
into
the
garbage.
2.
You
should
______
______(关闭)the
electricity
when
you
leave
a
room.
3.
You’d
better
walk
or
ride
a
bike
______
_____
(代替)
taking
a
bus
or
a
taxi
if
you
travel
a
short
distance.
4.
It’s
so
______(容易)
to
be
a
greener
person.
5.
_______
_____
_____
_____
________.(行动胜于言辞)
ought
to
shut
off
instead
of
easy
Actions
speak
louder
than
words
Exercises
二、单选。
1.
It's
easy
everyone
to
protect
the
environment.
A.
for
B.
of
C.
to
D.
that
2.
Please
remember
to
the
tap
after
using
the
water.
A.
turn
off
B.
close
C.
shut
off
D.
turn
down
3.
A
country
have
a
dream.
We
teenagers
also
have
dreams.
A.
ought
to
B.
may
C.
can
D.
have
to
4.
Get
up
early,
you'll
be
late
for
school.
A.
so
B.
and
C.
or
D.
but
5.
After
the
hard
work,
what
we
want
is
a
rest.
A.
have
B.
has
C.
had
D.
to
have
Read
1a.
Memorize
the
useful
expressions
and
key
sentences
that
we
learn
today.
Finish
Section
B
in
your
workbook.
Preview
Section
C.
Section
B
复习重点
1.
ought
to
应该
ought
to
+
V原
ought
not
to
+
V原
2.
turn
off：关掉
shut
off：（机器）停住不工作，关掉（机器）；切断
（水，煤气或电）
turn
up：（把音量）调高，开大
turn
down：（把音量）调低，关小
3.
Easier
said
than
done.
说起来容易做起来难。
Actions
speak
louder
than
words.
行动胜于言辞。
