Unit 13 We're trying to save the earth! 重点知识点讲解练习人教版英语九年级全册（无答案）

Unit 13 We are trying to save the earth!
一、重点单词
1、litter v.乱扔｜｜n.垃圾；废弃物 v.使遍布
2 、bottom n．底部；最下部
3 、advantage n．优点；有利条件
4、cost v.（cost，cost）花费｜｜n.花费；价钱考n.成本；代价
5、harmful adj.有害的
6、 take part in 参加
7、afford v.承担得起（后果）；买得起
8 、pay for 付费；付出代价
9、 take action 采取行动
10 、recycle v.回收利用；再利用
11、throw away 扔掉；抛弃
12、pull...down 拆下；摧毁
13、upside down上下颠倒；倒转
14、president n.负责人；主席；总统
二、重点短语
1.stop the sale of shark fins阻止鱼翅交易
2.so far到目前为止
3.scientific studies.科学研究
4.be in danger处于危险中
5.afford to do承担的起
6. take action采取行动
7.begin with从...开始
8.take part in参加
9.add up加起来，总计
10.pay for为...付款
11.recycle books and paper循环利用书籍和纸张
12.turn off关闭
13.use paper napkins用纸巾
14.throw away扔掉，抛弃
15.put sth to good use好好利用某物
16.have a creative mind有一个创新思维
17.a most unusual woman一个很不寻常的妇女
18.build/make sth. herself out of rubbish她自己用垃圾建造
19.pull down拆下，摧毁
20.turn upside down上下颠倒过来，倒转
21.be made of由...做成
22.an inspiration to sb. 对某人是个鼓舞
23.be good at recycling擅长循环利用
24.use sth. to do用某物去做什么
25.set up a website .创建网站
26.set up a small business开一家小公司
27.sell them online网上卖他们
28. plan to do计划做
29.write a book about写一本关于...的书
30.new ways to do sth. 干什么的新办法
三、重点知识点讲解
1、litter n. 垃圾 v. 乱扔
2、cut down 削减；砍倒
3、 cost v. & n. 花费
4、not only ...but also... 不但……而且……
5、take part in 参加
6、 Everyone in this town should play a part in cleaning it up!
7、There are other advantages of bike riding.
8、 So together, our actions can make a difference and lead to a better future!
9、If their numbers drop too low, it will bring danger to all ocean life.
10、So far, no scientific studies have shown that shark fins are good for health, so why eat them
讲解版
1、litter n. 垃圾 v. 乱扔
1、litter作名词相当于rubbish，是不可数名词。
2、litter作动词用意为＂乱扔＂。
2、cut down 削减；砍倒
cut down意为＂减少＂
cut down 砍倒；减少
cut off 切掉
cut out 删除
cut up 切碎
3、 cost v. & n. 花费
cost作动词时，常用于Sth cost(s) sb some money.
【辨析】 take / spend / cost /pay
1、spend的主语必须是人
①spend time / money on sth 在……上花费时间(金钱)
②spend time / money (in) doing sth 花费时间(金钱)做某事
2、cost的主语是物或某种活动，还可以表示＂值＂
①sth costs (sb) ＋金钱 某物花了(某人)多少钱
②(doing) sth costs (sb)＋时间 某物(做某事)花了(某人)多少时间
3、take后面常跟双宾语
①It takes sb.＋时间＋to do sth. 做某事花了某人多少时间
②doing sth. takes sb.＋时间 做某事花了某人多少时间
4、pay的基本用法是：
①pay (sb) money for sth 付钱(给某人)买…… ②pay for sth 付……的钱
③pay for sb 替某人付钱 ④pay sb 付钱给某人
⑤pay money back 还钱
4、not only ...but also... 不但……而且……
not only ...but also... 意为＂不但……而且……＂，其中also可以省略。连接并列主语时，句子的谓语动词应与but also后的主语的人称和数保持一致。
either...or...意为＂或者……或者……，不是……就是……＂，当其连接并列主语时，谓语动词要和最近的主语保持人称和数的一致。
both... and...意为＂……和……都＂，当其连接并列主语时，谓语动词要用复数形式。
5、take part in 参加
【辨析】 take part in/join/join in/attend
take part in 指参加会议或群众性活动等，重点说明句子的主语参加该项活动，并在其中发挥作用。
join 指加入某个党派、团体、组织等，如＂参军、入团、入党＂等。
join in 指参加某种活动，如＂游戏＂等，join in sth意为＂参加某事＂。
attend 侧重参加或出席会议、学术活动、音乐会、上课等，着重强调成为其中的听众或观众。
6、 Everyone in this town should play a part in cleaning it up!
play a part in...的意思是＂在……起作用＂，相当于play a role in...。
7、There are other advantages of bike riding.
advantage的意思是＂优点；有利条件＂，
反义词是disadvantage，意思是＂缺点，不利条件＂。
have the advantage of 胜过……
8、 So together, our actions can make a difference and lead to a better future!
make a difference的意思是＂有重大的影响＂；lead to的意思是＂导致，引导＂。
9、If their numbers drop too low, it will bring danger to all ocean life.
if引导的是条件状语从句，谓语动词使用一般现在时表示将来，主句使用一般将来时。
10、So far, no scientific studies have shown that shark fins are good for health, so why eat them
1、so far的意思是＂到目前为止＂，主句时态使用现在完成时。
2、句中that引导的是宾语从句，作动词shown的宾语。be good for的意思是＂对……有好处＂。
练习
一、单选题
1．There is________advantage of this machine. It can save much electricity.
A．an B．a C．the D．/
2．It is ________ of you to kill cats and dogs. They are our friends.
A．cruel B．nice C．good D．reusable
3．Sharks are at the top of the food chain, ________ if their numbers drop, the ocean’s ecosystem will be in danger.
A．when B．although C．so D．but
4．Don’t talk in a ________ voice. We can’t hear you clearly.
A．tall B．short C．high D．low
5．He hopes to set up ________ “metal art” theme park to show people the importance of environmental protection.
A．a B．an C．the D．/
6．—The dress is very nice. I’ll take it.
—But you’d better________first. I think it’s a little large for you.
A．pay for it B．put it on C．put it off D．try it on
7．When my mother came into my room, I was just lying in bed and waiting for the alarm to ________.
A．put off B．take off C．turn off D．go off
8.Tomorrow is Earth Day. Let’s discuss _________.
A．when shall we give out the leaflets B．what we can do to recycle things
C．how should we save more energy D．whether can we make our city greener
9．Jim, you’d better not ________ too much time on your mobile phone.
A．cost B．spend C．take D．pay
10．The Tokyo Olympics will be held from July 23 to Aug 8. Chinese athletes （运动员）will ________155 events.
A．take part in B．take care of C．take pride in D．pay attention to
二、用所给词的适当形式填空
1.Look! Some volunteers______________(clean) up the park.
2.His father used to ___________(stay) at home, but now he is used to ______(take) a walk after dinner.
3.Mobile phones mustn’t ______________(bring) to the classroom in our school.
4.A talk on how to learn English _____________(give) in the school hall. I’m looking forward to it.
5.Qian Xuesen ______________(consider) as “Father of Missile(导弹) in China”
6．This toy will help children with their _________(create)
7．Someday you will come to realize the _________ of English.(important)
8．I think we _________ pretty well so far.(do)
9．What do you think of the _____________pollution？(environment)
10．Studying English has many _________．(advantage)
三、根据汉语提示完成句子
1．工人们正在竭尽全力降低事故率。
The workers are doing all they can ________ ________ ________ the accident rate.
2．我的家乡的天空过去常常是蓝色的。
The sky in my hometown ________ ________ ________ blue.
3．我们的行动会使它变得不同，并通向更好的未来。
Our action can ________ ________ ________ and lead to a better future.
4．旧的楼房已经被拆除了。
The old buildings __________ __________ ________ ________.
5．我们很高兴看到我们的城市在过去的几年里变得越来越美丽。
We are happy to see our city ________ ________ more and more beautiful in the _______ ______ _______．
6.这个房间里将有一个聚会, 请在聚会后把房间打扫干净。
There will be a party in this room. Please it after the party.
7.树对我们是有用的, 当我们砍倒一些时, 应该栽更多。
Trees are very useful to us. We should plant more when we some .
8.这条裙子花了我60美元。
The dress $60.
9.我们的行动会带来不同, 并引领一个更好的未来。
Our actions can and lead to a better future.
10.这条河被严重污染了。
The river .
四、阅读回答问题
Global Warming
Satter lives in Bonnotola (BT) in southwestern Bangladesh (孟加拉国) . The small seaside village was once home to 2,000 people. Most of them were farmers, like Satter. But rising seas poisoned (毒化) the soil with salt water. Two major storms in the last two years destroyed the mud barriers (土坝) that protected the village from the sea. Today, only 480 people remain.
“The effects of global warming are destroying parts of Bangladesh,” said Mohammad who is the head of the research center PRD．
Salt in soil has increased by 26 percent over the past 35 years. In 1973, 833,000 hectares of land were poisoned by sea water. Areas of fresh water were also poisoned. This grew to 1.02 million hectares in 2000, and 1.056 million hectares in 2009, reports Bangladesh’s SRDI.
At BT village, the women walk up to 4 kilometers to a well to collect water for cooking and drinking every day. Wells in the area only have fresh water in the months after yearly heavy rains. In the summer, fresh water is difficult to find, said one of the women, Halder.
The villages lie in Bangladesh’s southwestern Shyamnagar area. The area is home to 400,000 people. Officials say the government does not have the money to build desalination factories. “The area needs maybe 500 desalination factories. But we’ve only got 50,” said Alamgir head of a local organization.
The United Nations made a report that warned global warming would get worse in the coming years even if humans immediately stopped producing carbon gas.
After the UN report, the question remains: Will world leaders choose to protect the environment
No matter what the world leaders do, there are a lot of ways individual (个体) people can make choices to protect the environment. People can change what they eat or travel without getting on an airplane, for example.
Benjamin Clarysse is a bio-engineer who works with a number of environmental groups in northern Belgium. He warns, political leaders still need to promise changes. They cannot just depend on citizens doing their part. “They cannot just say that everyone should just do a little bit of the work,” Clarysse said. “Depending on just the goodwill of people won’t get you there.”
1．What destroyed the mud barriers from the Village BT
_____________________________________
2．Why do women walk up to a well at BT village every day
_____________________________________
3．How many desalination factories does Shyamnagar area have
_____________________________________
4．According to the passage, who are supposed to protect the environment
_____________________________________
5．How can we deal with global warming
_____________________________________