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unit 13 we are trying to save the earth
每课
的练习题
语言目标
谈论污染和环境保护。
Section A
重点
短语
a difference
起作用；
有影
响
2. take part in
参加
3. turn off
关掉
4. pay for
付费；付出代价
5. cut
down
减少
6. lead
to
导致
7. hear of
听说
8. cut off
切除
Section A
(1a-2d)
【基础预习】
I.
写出下面单词的意思。
1. littler ______ 2. bottom ________ 3.
fisher
man _____ 3. coal __________ 5.
ugly _____
___ 6. advantage ______ 7.
cost ________ 8.
wooden ________ 9.
plastic _______
II.
把下面的短语与汉语意思搭配。
1. make a difference
A.
参与
2. cut down
B.
充满
3. lead to
C.
减少
4. be full of
D.
起作用
5. play a
part in
E.
导致
通往
【重点讲练】
辨析：
turn, get
与
become
⑴
become
多指身份、职位等的
变化，它强
调变化的过程已经完成，
后面可接名词或形
容词。
He becomes a
teacher.
他成了一名老师。
⑵
get
多用于口语，表示一种变化过程，强
调的是“渐渐变得”
，后常
接形容词的比较
级形式。
In
winter the days get shorter.
冬
季
白
天
变
得较短。
⑶
turn
指在颜色和性质等方面与以前的完
全不同，强调变化的结果
山里的树叶已变成了棕色。
【小试牛刀】用
turn, get
和
become
填
空。
①
Her mother
____ angry when she h
eard the news.
2
It’s
_____ darker
and darker outside.
③
The
milk has _____ bad.
cut off
< br>切
断
；
切
除
cut into
把
?
?
切
成
?
?
cut up
切碎
cut in
插队
【
小
试
牛
刀
】
单
项
选
择
—
Did you tell it to
Jack?
Yes, but we were ____ in the
middle of our t
elephone conversation.
A. cut down B. cut
off C. cut up D.
cut into
辨析：
spend, cost,
take, pay
花费
主语
表示
的内容
【
小
试
牛
刀
】
单
项
选
择
1.
—
Do you take exercise every
day?
—
Yes. I always
___thirty minutes after supper
. A.
spend B. cost C. take D. pay
2. I
_________ $$300 for the bike. A. took B.
spent C. cost D. paid
【达标训练】
Ⅰ
.
用方框中所给词的适当形
式填空。
cost, wood, coal, bottom, litter
1.
Don
’
t
throw____ (
垃圾
)
everywhere.
2. In winter, many people
burn ____ (
煤
) to
keep warm. 3. The police found a body at
t
he ____ (
底部
) of
the lake.
4. The _____
(
费
用
) of living in
big cities is very high.
5. He keeps
a rabbit in a big ____
(
木
制
的
)
box.
II.
单
项
选
择
。
1. He
____ go out with his parents, but
now
he
____ staying at home alone.
A. used to; is used to B. is used to;
used to C
. use to; is used to D. is
used to; is used to 2.
The interesting
book _____ me 10 yuan. A.
spent B.
took C. paid D. cost
3. We must do
something useful to ____ poll
ution.
A. cut off B. cut up C. cut down D.
cut in
4. Smoking can _____ lung
cancer.
You’d
be
tter give it up. A. work on B.
lead to C. ta
ke away D. put out
5.
—
What are the
_____ of bike riding?
—
It
can help cut down air pollution. A.
adva
ntages B. reasons C. results
D. ideas
III.
根据汉语提示完成下面的句子。
2.
这个木箱时装满了书。
The __
box ____ ____ ____
books.
3.
不健康的饮食对这种疾病的传播起一
定
的作用。
Unhealthy foods ___ ___ ___ ___ the
sprea
d of the illness
4.
这条小路通向公园。
The
path ____ ____ the park.
5.
我错拿了你的包。
I took
your bag ____ ____ mine by mistake.
Section A
(3a-4c)
【基础预习】
I.
根据汉语提示写出下面句中所缺的单词。
1. I have a simple and easy ____
(
方
法
) to solve the
problem.
2. We
shouldn
’
t be ____
(
残
忍
的
)
to animals.
3.
It
’
s ____
(
有
害
的
)
to your health to drink to much.
4.
The city is the _____
(
工
业
) center of
the country.
5. The car is too
expensive, I can
’
t ___
(
买
得起
) it.
II
翻译
1. take part in __________ 2. turn off
_____
_______ 3. pay for ____________ 4.
hear of
_____________ 5. be harmful to
____
【小试牛刀】改为同义句。
Reading in the sun does harm to our
eyes.
Reading in the sun ___ ___ ___
our eyes.
2. Have you ever taken part
in an environm
ental project?
你曾经参加过环境保护活动
吗？
辨析：
join, join in
和
take part in
加入组织，团体，党派等，有作
join
为其中的一个成员的含义。
后面也可
以加表示人的名词，
表示和某人一起参加某
活动。
join in
加入一种具体活动。
take
part in
指参加会议或群众性活动等，
着重说明句子
主语参加该项活动
⑴
afford
是动词，意为―买得
起
,
担负得
起‖，通常与
can, could, be able to
连用
,
多
用于否定句中。
I.
用方框中词的适当形式完成下面的句子。
method, cruel, harmful, afford, law
1.
I
think
it’s
____ to make such
a young boy
work all day.
2. The poor fisherman
can’t
_____ his
child
ren’s
education.
3. I think the government must develop
___
__ to protect environment.
4. Eating too much junk food is ____
your h
ealth. 5. He can use different
_____ to work
out the problem.
II.
单项选择。
1.
—
Are you going
to _____ any of the event
s?
—
Yes. Maybe long jump and
high jump.
A. take part in B. join
C. attend D. join
in
2.
I
can’t
afford ____ him an
expensive birt
hday present. A. to buy
B. buying C. for
buying D. buy
3.
—
Remember to
____ the lights when you
leave the
room.
—
OK. I will. A.
turn on
B. turn down C. turn up D.
turn off
4. The girl always has some
money to ___ sn
acks. A. spend B.
pay for C. take D. co
st
5.
—
Look! _____
boys are playing on the pl
ayground.
Yes. _____ them is about 200. A. The
numb
er of; A number of B. The number
of; The
number of C. A number of; the
number of
D. A number of; A number of
III.
根据汉语
提示完成句子。
1.
我
们
必
须
采
取
行
动
来
阻
止
他
们。
We must ____
____ to stop them.
2.
我从没听说过这个人。
I
have never ____ ____ such a man.
3.
我们乐意尽力帮你摆脱困境。
We are glad to do what we can do ___
___
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