(共21张PPT)
Unit
2
Saving
the
Earth
Topic
3
What
can
we
do
at
home
to
protect
the
environment?
Section
D
Grammar
Compound
Sentence
Recycling
can
protect
the
environment,
_______
it
can
save
money,
too.
Some
things
we
have
done
are
good
for
the
earth
_________
some
are
bad.
We
should
do
everything
to
protect
it,
________
we’ll
be
punished
and
lose
our
home.
…people
produce
power
from
coal,
_______
it
is
very
dirty
and
causes
acid
rain
.
and
while
or
but
(
)
1.
Help
others
whenever
you
can
_____
you’ll
make
the
world
a
nicer
place
to
live
in.
A.
or
B.
and
C.
but
D.
while
(
)2.
Cross
the
road
carefully,
________
you’ll
keep
yourself
safe
.
A.
so
B.
or
C.
but
D.
and
(
)
3.
Hurry
up,
________
you’ll
be
late
for
the
concert
.
A.
or
B.
so
C.
but
D.
and
(
)
4.
---Tell
us
something
about
Canada,
OK?
---
I’m
sorry.
________
Jack
_______
I
have
ever
been
there.
A.
Either,
or
B.
Not
only,
but
also
C.
Both,
and
D.
Neither,
nor
(
)
5.
I
always
enjoy
visiting
London,
______
I
wouldn’t
like
to
live
there.
A.
because
B.
so
C.
but
D.
and
Choose
the
best
answer.
B
D
A
D
C
Functions
Would
you
like
to
be
a
__________
person?
First,
you
ought
to
_________
the
electricity
when
you
leave
a
room.
__________
said
than
done.
Action
speak
_________
than
words.
The
train
can
_________
a
top
speed
of
431
km
per
hour.
greener
shut
off
Easier
louder
reach
What
are
the
three
R’s?
Which
means
“make
something
less
or
smaller”?
What
should
we
reduce?
Which
means
“use
it
again”?
What
should
we
reuse?
What
should
we
do
about
recycling?
Reduce,
reuse
and
recycle.
Reduce.
We
should
reduce
the
things
which
people
can
use
only
once.
Reuse.
We
should
reuse
plastic
bags.
We
should
collect
waste
paper
or
soft
drink
cans,
and
sort
them
so
that
they
can
be
recycled.
Can
you
answer
them?
Throw
the
rubbish
here
and
there.
Don’t
spit
in
a
public
place.
Draw
a
beautiful
picture
on
the
public
walls.
Don’t
throw
things
away
if
they
can
be
reused.
Go
to
school
by
bike
instead
of
by
bus.
Collect
the
rubbish
and
try
to
sort
it.
Pour
dirty
water
into
rivers
directly.
Turn
off
the
lights
when
you
go
out.
Which
one
is
right?
How
important
is
the
forest?
Forests
are
the
lungs
of
the
earth.
Remove
carbon
dioxide
from
the
air
Make
oxygen
Cut
down
Build
houses
Plant
trees
How
do
you
understand
“Forests
are
the
lungs
of
the
earth”?
Forests
can
remove
carbon
dioxide
from
the
air
and
make
oxygen.
Retell
it
What
difficulties
do
tree
planters
face
when
they
plant
trees
?
(1)The
weather
may
be
very
hot
and
dry
or
it
may
be
very
cold
and
wet.
(2)There
are
often
many
insects
that
bite
these
planters
on
their
legs,
arms,
and
faces
while
they
work.
(3)They
carry
heavy
bags
of
small
trees,
and
working
in
the
mountains
can
be
dangerous.
Paragraph
2
adj.干燥的，雨少的，干性的
v.
使……干，弄干，擦干
Why
do
they
plant
different
kinds
of
trees
?
They
plant
different
types
of
trees
so
that
birds
and
animals
can
live
in
the
forests.
Paragraph
3
What
will
happen
if
we
do
not
plant
new
forests
?
The
forests
will
become
less
and
less.
We
cannot
breathe
without
them.
Would
you
like
to
be
a
tree
planter
when
you
are
older
?
Why
or
why
not
?
…
Have
a
try
1.
Answer
the
following
questions
to
see
how
green
you
are.
Project
Finding
the
Greenest
Person
=2
=1
=0
0—4
You
have
not
started
turning
green
yet!
5—9
You
are
pale
green.
10—13
You
are
medium
green.
Try
harder.
14—18
You
are
bright
green,
but
do
not
stop
trying.
Score:
=3
1、Do
you
usually
recycle
newspaper
or
cans?
Often.
Seldom.
Never.
2.
What
do
you
usually
take
?
A
bath.
A
shower.
3.
When
you
have
a
short
journey,how
do
you
usually
go
there
?
Walk
or
ride
a
bike.
Go
by
car.
Go
by
bus.
4.
What
do
you
usually
do
when
you
see
others
littering?
Stop
them.
Pick
the
litter
up.
Do
nothing.
Project
5.
How
often
do
you
use
paper
towels?
Often.
Seldom.
Never.
6.
How
often
do
you
eat
fast
food?
Often.
Seldom.
Never.
7.
What
type
of
bags
do
you
use
for
shopping?
Baskets
or
cloth
bags.
Reused
plastic
bags.
New
plastic
bags.
8.
How
often
do
you
turn
off
the
lights
when
you
leave
a
room?
Nearly
always.
Seldom.
Never.
Project
We
learn:
1.
Some
words:
dry
2.
Some
phrases:
provide
sth.
to
do
sth.;
face
difficulties;
even
though
3.
Some
sentences:
(1)Without
them,
it
cannot
breathe.
(2)They
plant
different
types
of
trees
so
that
birds
and
animals
can
live
in
the
forests.
We
can:
1.
Use
the
compound
sentence
correctly.
2.
Realize
the
importance
of
the
forest.
Summary
Read
1a.
Memorize
the
useful
expressions
and
key
sentences
which
we
learn
in
this
topic.
Finish
Section
D
in
your
workbook.
Review
what
we
learn
in
this
unit.
Assignment
Thank
you!
