人教版（2019）英语高中选择性必修第一册 Unit 5 Using language 2（30张PPT）

(共30张PPT)
Unit
5
WORKING
THE
LAND
To
understand
the
differences
between
chemical
and
organic
farming
and
their
advantages
and
disadvantages;
To
learn
about
the
author's
writing
techniques;
To
learn
about
the
structure
of
argumentative
essay;
To
write
an
essay
to
express
your
views
on
chemical
farming
or
organic
farming.
What
is
the
substance
that
is
put
on
the
soil
to
make
plants
grow
It
is
fertilizer.
What
kind
of
fertilizers
do
farmers
use
Chemical
fertilizers
Natural
waste
from
animals
To
protect
the
crops,
farmers
have
to
kill
off
the
harmful
pests.
What
is
the
chemical
used
for
killing pests,
especially
insects
Pesticides.
Organic
Farming
Organic
farming
is
simply
farming
without
using
any
chemicals.
Chemical
or
organic
farming
Which
tomatoes
do
you
prefer
5
yuan
/
kg
30
yuan
/
kg
Normal
tomatoes
Organic
tomatoes
Read
the
text
“Chemical
versus
organic
farming”
and
then
answer
the
following
questions.
1.
Why
did
many
farmers
welcome
the
introduction
of
chemical
farming
Because
it
is
a
great
way
to
fight
crop
disease
and
increase
production.
2.
What
concerns
many
people
about
the
use
of
pesticides
Pesticides
can
damage
the
land
by
killing
not
only
harmful
bacteria
and
insects,
but
also
helpful
ones.
In
addition,
these
chemicals
can
stay
in
the
soil
and
underground
water
sources
for
a
long
time,
which
affects
the
crops
grown
on
the
land
and
animals
and
humans
who
digest
them.
3.
What
is
one
problem
with
the
use
of
chemical
fertilisers
Crops
grown
with
chemical
fertilisers
usually
grow
too
fast
to
be
rich
in
nutrition
and
they
often
have
less
flavor
as
well.
4.
How
is
organic
farming
different
from
chemical
farming
Organic
farming
is
simply
farming
without
using
any
chemicals.
5.
Why
do
organic
farmers
change
the
kind
of
crop
grown
in
a
field
every
year
Because
different
kinds
of
crops
put
important
minerals
back
into
the
ground,
making
it
ready
again
for
the
next
batch
of
crops.
6.
What
is
the
goal
of
using
organic
farming
methods
Do
you
think
it
can
be
reached
Why
or
why
not
The
goal
of
using
organic
farming
methods
is
to
grow
good
food
while
avoiding
damage
to
the
environment
or
to
people’s
health.
There
is
still
a
long
way
to
reach
the
goal
because
organic
farming
cannot
serve
the
high
demand
for
food
around
the
world.
Match
the
main
ideas
(A-D)
below
with
the
paragraphs.
A
What
organic
farming
is
B
Why
man-made
chemicals
are
still
used
in
farming
C
Organic
methods
for
producing
rich
soil
D
The
problems
with
chemical
farming
Para.
1-2
Para.
3
Para.
4
Para.
5
D
A
C
B
Complete
the
sentences
in
the
tables.
Para.
Main
Idea
Detail
1-2
Pesticides
can
kill
helpful
_____________
Some
pesticides
have
been
_______
because
of
the
________________
Crops
grown
with
chemical
fertilisers
usually
_____________
to
be
full
of
_________.
bacteria
and
insects
prohibited
damage
they
cause
to
people
and
the
environment
grow
too
fast
nutrition
D
Para.
Main
Idea
Detail
3
Many
organic
farmers
use
__________________
as
fertiliser.
4
They
often
__________________
grown
in
each
field
___________.
They
also
plant
crops
that
use
______________
of
the
soil
to
help
keep
it
rich.
5
Organic
farming
is
nowhere
near
able
to
meet
the
high
___________
____________________
waste
from
animals
change
the
kind
of
crop
every
year
different
depths
need/demand
for
food
around
the
world
natural
A
C
B
The
author
uses
some
connectives
when
explaining
the
details.
Find
and
underline
them.
Then
think
about
what
they
add
to
the
text.
Can
you
name
more
connectives
according
to
different
classes
Connectives
in
the
text:
and,
also,
but,
while,
however,
for
example,
for
instance,
in
addition,
in
fact,
as
for,
because,
therefore
Find
the
subject
clauses
used
in
the
text
and
underline
them.
Then
make
your
own
sentences
on
the
theme
of
chemical
and
organic
farming
.
①
Over
time,
however,
what
some
scientists
have
found
is
that
their
long-term
use
can
sometimes
harm
both
the
land
and
people’s
health.
②
Why
different
crops
are
grown
is
because
they
put
important
minerals
back
into
the
ground,
making
it
ready
again
for
the
next
batch
of
crops.
③
What
keeps
them
from
doing
so
is
the
fact
that
chemical
farming
serves
the
high
demand
for
food
around
the
world.
Discuss
these
questions
in
groups:

Is
the
author
of
the
passage
for
or
against
organic
farming
How
do
you
know

What
other
disadvantages
of
chemical
farming
did
the
author
not
list？
Write
an
argumentative
essay
giving
your
opinion
on
chemical
or
organic
farming.
Discuss
these
questions
in
groups:

How
might
the
following
items
be
problems
and
how
important
are
they
for
organic
farming
natural
animal
waste
used
as
fertilizer
higher
cost
of
producing
food
greater
effort
required
to
farm

What
other
disadvantages
of
organic
farming
can
you
think
of
Decide
topic
and
come
up
with
three
main
points
to
support
your
opinion,
and
then
add
at
least
one
detail
to
support
each
main
point.
Complete
the
outline
below.
Use
your
outline
to
write
a
short
essay
giving
your
opinion
on
the
topic.
1.
Use
the
checklist
to
help
you
review
your
partner’s
draft.
Exchange
your
draft
with
a
partner.
√
Does
the
writer
do
a
good
job
of
expressing
his/her
opinion
√
Does
each
paragraph
have
one
main
idea
√
Does
each
paragraph
have
at
least
one
detail
to
support
its
main
idea
√
Does
the
writer
sequence
the
points
in
a
logical
order
Are
there
any
connectives
in
the
essay
√
Does
the
writer
do
a
good
job
persuading
you
to
accept
his
/
her
opinion？
√
Does
the
writer
use
correct
grammar,
punctuation,
and
spelling
2.
Take
your
draft
back
and
revise
it.
3.
Share
your
essay
with
the
rest
of
the
class.
Finish
your
essay
and
revise
it
based
on
the
feedback.