(共31张PPT)
Unit
13
We’re
trying
to
save
the
earth.
Section
A
(1a-2d)
We’re
trying
to
save
the
earth.
我们在努力拯救地球。
The
rive
used
to
be
so
clean.
这河流过去是如此的清澈。
The
air
is
badly
polluted.
空气被严重污染。
The
method
is
not
only
cruel,
but
also
harmful
to
the
environment.
这种方法不仅残酷，而且对环境也有害。
基础预习
写出下面单词的意思
litter________
bottom________
fisherman_________
ugly__________
cost________
plastic________
coal_______
advantage_______
wooden_______
把下面的短语与汉语意思连起来。
make
a
diffenence
cut
down
lead
to
be
full
of
play
a
part
in
导致
起作用
减少
参与
充满
1a
Here
are
some
words
related
to
different
kinds
of
pollution.
Write
them
in
the
box
below.
Then
add
more
words.
noise
pollution
____________
____________
____________
____________
air
pollution
___________
___________
___________
___________
water
pollution
____________
____________
____________
____________
loud
music
planes
mobile
phones
factories
cars
smoking
ships
factories
littering
rubbish
building
houses
building
houses
loud
music
cars
rubbish
planes
littering
ships
factories
smoking
building
houses
mobile
phones
1b
Listen
and
complete
the
sentences.
What
was
the
problem?
The
river
was
_____________.
Even
the
bottom
(底部)
of
the
river
was
full
of
_________.
There
were
no
more
______
for
fishermen
(渔民)
to
catch.
really
dirty
rubbish
fish
What
caused
the
problem?
People
are
throwing
_______
into
the
river.
Factories
are
putting
______
into
the
river.
How
should
the
problem
be
solved?
We
should
write
to
the
____________
and
ask
them
to
___________
the
factories.
Everyone
should
help
to
__________
the
river.
litter
waste
government
close
down
clean
up
Listen
again
and
check
(√)
the
sentences
you
hear.
1.
We
could
go
fishing
in
the
river.
2.
The
river
was
really
dirty.
3.
The
river
has
always
been
the
nicest
river
in
this
town.
4.
We
should
ask
the
teachers
for
help.
√
√
1c
Role-play
the
conversation
The
river
was
dirty.
Even
the
bottom
of
the
river
was
full
of
rubbish.
But
it
used
to
be
so
clean!
2a
Listen
to
the
interview.
Circle
the
kinds
of
pollution
that
Jason
and
Susan
talk
about.
land
pollution
B.
air
pollution
C.
noise
pollution
D.
water
pollution
2b
Listen
again
and
complete
the
sentences.
1.
The
air
is
badly
polluted
because
there
are
___________
on
the
road
these
days.
2.
Factories
that
burn
coal
also
________
the
air
with
a
lot
of
black
smoke.
more
cars
pollute
3.
There
is
also
too
much
rubbish
and
waste.
People
_________________
things
every
day.
4.
People
are
also
littering
in
______________
like
parks.
This
is
turning
beautiful
places
into
ugly
(丑陋)
ones.
are
throwing
away
public
places
Interviewer:
Jason
and
Susan,
what
are
your
ideas
for
solving
these
problems?
Jason:
Well,
to
cut
down
air
pollution,
we
should
take
the
bus
or
subway
instead
of
driving.
Susan:
Yeah,
or
ride
a
bike.
Other
advantages
of
bike
riding
are
that
it’s
good
for
health
and
it
doesn’t
cost
anything!
Role-play
the
conversation.
2d
Interviewer:
Great
ideas!
What
about
waste
pollution?
Susan:
Mmm,
I
think
simple
things
like
bringing
a
bag
to
go
shopping
can
help.
I
started
doing
that
a
year
ago.
Jason:
Me,
too.
Also,
I
never
take
wooden
chopsticks
or
plastic
forks
when
I
buy
takeaway
food.
I
use
the
ones
at
home.
Susan:
And
remember
to
throw
rubbish
in
the
cans
and
keep
public
places
clean
and
beautiful
for
everyone.
Interviewer:
So
together,
our
actions
can
make
a
difference
and
lead
to
a
better
future!
1.
We’re
trying
to
save
the
earth!
我们正在竭尽全力拯救地球!
try
to
do
=try
one’s
best
to
do
努力去做某事。
e.g.
Every
student
should
try
to
study
hard
in
order
to
study
in
a
university.
为了进入大学学习，每个学生都应该
努力学习。
Language
points
2.
Here
are
some
words
related
to
different
kinds
of
pollution.
be
related
to
与…有关
e.g.?I
am
not?related?to?him
in
any
way.
我和他无任何关系。
3.
Everyone
in
this
town
should
play
a
part
in
cleaning
it
up!
play
a
part
in
在……方面起作用
e.g.
A
good
diet
plays
a
large
part
in
helping
people
live
longer.
健康的饮食在帮助人们长寿方面起着
非常大的作用。
play
a
part
在……中扮演角色
e.g.
He
was
invited
to
play
a
part
in
this
TV
play.
他被邀请参加这个电视剧的演出。
4.
Even
the
bottom
of
the
river
was
full
of
rubbish.
Yes,
but
people
are
throwing
litter
into
the
river.
litter和rubbish都可指“垃圾”，用作不可数名词。
rubbish指“没用的东西(被扔或将要丢弃的无用的东西)”不可回收。
litter指“(室内或公共场所)乱扔的废物(纸屑、不要的包装纸、废瓶等)”还可回收。
e.g.
Throw
the
rubbish
out.
把垃圾扔出去。
The
room
is
full
of
rubbish.
房间里堆满了垃圾。
Pick
up
your
litter
after
a
picnic.
野餐后将废弃物收拾好。
5.辨析：
turn,
get与become
(1)
become
多指身份，职位等的变化，
它强调变化过程已经完成，后面可以接名词
或者形容词。
He
becomes
a
teacher.
(2)
get多用于口语，表示一种变化过程，
强调的是“渐渐变化”后常接形容词的比较级形式。
In
winter
the
days
get
shorter.
冬天白天渐渐变短。
(3)
turn
指的是在颜色和性质等方面与以前的完全不同，强调变化的结果。
leaves
turned
brown
in
the
mountains.
山里的树叶已经变成了棕色。
Her
mother
______
angry
when
she
heard
the
news.
It's
_____
darker
and
darker
outside.
The
milk
has
______bad.
became
getting
turned
6.
cut
down,
意为"减少"；
是“动词+副词”结构的短语，后面所带的宾语为名词时，宾语可以位于down的前面或后面；为代词时只能位于down前面。
You'd
better
cut
the
article
down
to
about
2000
words.
cut
后接off,
into,up,
in
的不同：
cut
off
切断；切除
cut
into
把...切成...
cut
up
切碎
cut
in
插队
花费
主语
表示内容
spend
人
宾语可以是钱，精力，时间等。
cost
物或事
后接life，money，health，time等，侧重与花费的代价
take
事或人
说明事情完成花费了...
7.
辨析：spend,
cost,
take,
pay
花费
主语
表示内容
pay
人
"支付"
作为及物动词，可以是
pay
sb
或pay
some
money；作为不及物动词，形式为pay
for。for表支付的原因。
1.
He
___
go
out
with
his
parents,
but
now
he
_____
stay
at
home
alone.
A.
use
to;
is
used
to
B.
is
used
to;
used
to
C.
use
to;
used
to
D.
is
used
to;
is
used
to
2.
The
interesting
book
___
me
10
yuan.
A.
took
B.
paid
C.
spend
D.
cost
Exercises
3.
We
must
do
something
useful
to
___
pollution.
A.
cut
off
B.
cut
up
C.
cut
down
D.
cut
in
4.
Smoking
can
___
lung
cancer.
you'd
better
give
it
up.
A．work
on
B．lead
to
C．take
away
D．put
out
5.
--What
are
the
___
of
bike
riding?
--
It
can
help
cut
down
air
pollution.
A．advantage
B．reasons
C．results
D．ideas
用方框中所给词的适当形式填空。
1.
Don't
throw
_______(垃圾)
everywhere.
2.
In
winter,
many
people
burn
______(煤)
to
keep
warm.
3.
The
police
found
a
body
at
the
________(底部)
of
the
lake.
4.
The
______(花费)
of
living
in
big
cities
is
very
high.
5.
He
keeps
a
rabbit
in
a
big
_______(木制的)
box.
cost
wooden,
coal
,
bottom,
litter
cost
wooden
coal
bottom
litter
