【课堂练习】Unit 13 We're trying to save the earth! Period 2 同步习题课件

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人教版-九年级全册 英语
Period 2　Section A 3a－ 4c
Unit 13　
We're trying to save the earth!
目录
课前预习
课堂专练
课前预习
一、词汇预习
名　词 1.鲨鱼_______________________________
2.(鱼)鳍______________________________
3.链子；链条_________________________
4.生态系统___________________________
5.工业；行业_________________________
6.法律；法规_________________________
7.运输业；交通运输___________________
shark　
fin　
chain　
ecosystem　
industry
law　
transportation
形容词 8.残酷的；残忍的___________________
9.有害的___________________________
10.科学上的；科学的________________
11.可重复使用的____________________
动　词 12.承担得起(后果)；买得起__________
cruel　
harmful　
scientific　
reusable　
afford
二、短语预习
1.对……有害_________________________________
2.在……顶部或顶端___________________________
3.食物链_____________________________________
4.参加_______________________________________
5.关掉_______________________________________
6.付费；付出代价_____________________________
7.采取行动___________________________________
be harmful to　
at the top of　
the food chain
take part in　
turn off　
pay for　
take action
三、句子预习，每空一词
1.有些种类的鲨鱼的数量在过去的20到30年里减少了90%多。
________ ________ ________ some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
2.是的，我们不能再等了，行动起来吧！
Yes, we can't________ to wait any longer to ________ ________！
The
numbers
of　
afford
take
action
3.我们正在努力拯救地球。
We ________ ________ to save the earth.
4.还没有科学研究表明鱼翅对健康有益。
No scientific studies ________ ________ ________ shark fins are good for health.
5.空气被严重污染了。
The air ________ ________ ________.
are
trying
have
shown
that　
is
badly
polluted
课堂专练
一、 根据3a部分的短文，完成下面的思维导图。
Save the Sharks!
1.___________ 2.___________ 3.___________
4.___________ 5.___________ 6.___________
7.___________________________________________　　
cut off　
throw　
cruel　
harmful　
danger
70 million　
have fallen by over 90 percent
8._________________________
9._________________________ 　　
develop laws　
scientific
二、请认真阅读3a短文，选择正确选项。
(　　)1.Shark fin soup is especially popular in ________ China.
A.western B.southern
C.northeastern D.eastern
(　　)2.When people catch sharks, they cut off their ____ and throw the sharks back into the ocean.
A.teeth B.heads
C.fins D.eyes
B
C
(　　)3.Without a fin, a shark can no longer ________ and slowly dies.
A.swim B.walk
C.see D.eat
(　　)4.Sharks are at the top of the food chain in the ecosystem of ________.
A.the forest B.the fresh water
C.the land D.the ocean
A
D
(　　)5.The numbers of some kinds of sharks ________ in the last 20 to 30 years.
A.have fallen by over 90 percent
B.have increased by 90 percent
C.haven't changed
D.have increased to 90 percent
A
三、 考点探究
The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.有些种类的鲨鱼的数量在过去的20到30年里减少了90%多。
【辨析】the number of与a number of
the number of “……的数量”，后跟复合名词，做主语时，谓语动词用单数形式。 The number of students is getting smaller and smaller.学生的人数正越来越少。
a number of “许多”，相当于many，修饰复数名词，做主语时，谓语动词用复数形式。 A number of my friends have been to Beijing.我的许多朋友去过北京。
用the number of或a number of填空
1.______________ foreigners learning Chinese are also increasing.
2.—Hi, Linda.How many girls are there in your class
—_____________________ the girls is thirteen and ______________ them are my good friends.
The numbers of
The number of
a number of
Yes, we can't afford to wait any longer to take action!
是的，我们不能再等了，行动起来吧！
(1)afford动词，意为“承担得起(后果)；买得起”。与can或be able to连用，表示在能力上、经济上或时间上能承受或做到某事，多用于________。其后经常接名词、代词或动词________做宾语。
例：I can't afford three days away from work.
我不能三天不上班。
He can't afford to buy a car.他买不起汽车。
否定句
不定式
(2)take action意为“采取行动”。表达“采取行动做某事”则用take action ________ sth.。
例：I did not take immediate action.
我没有立即采取行动。
to do
翻译句子，每空一词
1.这栋房子太贵。我买不起。
The house is too expensive.I ________ ________ ________.
2.政府应该采取行动保护野生生物。
Governments should ________ ________ ________ ________ wildlife.
can't
afford
it　
take
action
to
protect
四、 根据3a部分的短文，完成下面的语法选择。
Many have heard of shark fin soup.This famous and expensive dish is especially popular in southern China.But do you realize __1__ you're killing a whole shark each time you enjoy a bowl of shark fin soup
When people catch sharks, they cut off their fins __2__ then throw the sharks back into the ocean.
(　　)1.A.who B.which C.what D.that
(　　)2.A.but B.and C.or D.so
D
B
This is not only cruel but also harmful __3__ the environment.Without __4__ fin, a shark can no longer swim and slowly dies.Sharks are at the top of the food chain in the ocean's ecosystem.If their numbers drop too low, it __5__ danger to all ocean life.Many believe that
(　　)3.A.into B.at C.of D.to
(　　)4.A./ B.a C.an D.the
(　　)5.A.brought B.brings
C.will bring D.has brought
D
B
C
sharks can never be endangered because they are __6__ in their food chain.But in fact, around 70 million sharks __7__ and traded in this industry every year.The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
(　　)6.A.strong B.stronger
C.strongest D.the strongest
(　　)7.A.is caught B.are caught
C.catch D.caught
D
B
Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”.They have even asked governments to develop laws __8__ the sale of shark's fins.So far, no scientific studies have shown that shark fins are good for health, so why eat __9__？ We __10__ help save the sharks.
(　　)8.A.stop B.to stop C.stopping D.stopped
(　　)9.A.they B.them C.their D.themselves
(　　)10.A.should B.will C.would D.might
B
B
A
一、现在进行时
现在进行时表示现在正在发生或进行的动作。常见的标志词有now, at the moment, look，listen等。其构成为“_____________________________”。
am/is/are＋动词 ing形式
用法 示例
表示说话时或目前正在进行的动作。 Don't make such loud noise.The children are having an English lesson.不要弄出这么大响声。孩子们正在上英语课。
用法 示例
一些表示位置移动的动词，如go, come, leave, arrive等，常用现在进行时表将来。 He is leaving for Shanghai tomorrow.
明天他将前往上海。
注意：通常不用于现在进行时的动词
1.表示感觉、情感、心理活动的动词，如see, hear, smell, taste, notice, seem, hate, like, love, want, wish等；
2.表示所有或占有的动词，如have, own, belong等；
3.表示记忆、理解或决定的动词，如forget, remember, understand, believe, know, decide等。
二、现在完成时
现在完成时表示过去发生的动作对现在造成的影响或产生的结果。其结构为“__________________”。
用法 示例
表示到现在为止已经发生的动作或状态，句中常用already, just或yet。 They have already cleaned the classroom.
他们已经打扫了教室。
表示到现在为止曾经或从来没有发生过的动作或状态。句中常用ever或never。 I have ever been to that country.
我曾去过那个国家。
have/has＋过去分词
用法 示例
表示到目前为止某一动作已经发生了若干次，句中常用once, twice, … times。 So far, I have seen the film twice.到目前为止，这部电影我已经看了两遍了。
表示一段时间以来某一动作或者状态一直发生，句中常用since或for(注意：动词为延续性动词)。 I have lived here for more than twenty years.我住在这儿二十多年了。
三、 被动语态
被动语态是由“___________________________”构成。主动语态变被动语态时，be动词的时态要跟原主动语态中的时态一致。
类型 结构 示例
一般现在时的被动语态 am/is/are＋及物动词的过去分词 English isn't spoken by people here.
这儿的人不说英语。
一般过去时的被动语态 was/were＋及物动词的过去分词 This book was written by Lu Xun.
这本书是鲁迅写的。
be动词＋及物动词的过去分词
类型 结构 示例
一般将来时的被动语态 will/shall be＋及物动词的过去分词 Lei Feng will be remembered by us forever.雷锋将永远被我们记住。
现在进行时的被动语态 am/is/are＋being＋及物动词的过去分词 Many trees are being cut down now.现在许多树正在被砍伐。
类型 结构 示例
现在完成时的被动语态 have/has been＋及物动词的过去分词 Man made satellites have been sent up into space by many countries.人造卫星已被许多国家发射到太空中去。
含情态动词的被动语态 情态动词＋be＋及物动词的过去分词 All the exercises must be finished before school is over.所有习题必须在放学前做完。
一、 语法选择
I'm Kangkang.Now I __1__ my report.For this report I interviewed my grandmother.She __2__ in Beijing for more than forty years.
In the 1960s, the living conditions in the city were poor.The roads were narrow and there weren't many
(　　)1.A.write B.am writing
C.wrote D.will write
(　　)2.A.live B.is living
C.will live D.has lived
B
D
ring roads.Big families were crowded into small houses.Many families__3__ get enough food.Few children had the chance to receive a good education.People had little money to see a doctor.And there were few hospitals.People __4__ in touch with their friends and relatives far away mainly by letter or telegram.
(　　)3.A.can't B.couldn't
C.won't D.wouldn't
(　　)4.A.kept B.are keeping
C.were keeping D.keep
B
A
China __5__ rapidly since the reform and opening up.People's living conditions have improved a lot.Children can study not only in modern schools but also on the Internet.People can enjoy good medical care.
(　　)5.A.develops B.developed
C.will develop D.has developed
D
What's more, communications are becoming easier and quicker — people can use telephones, cellphones, fax machines and the Internet.Look! My grandmother __6__ with my aunt on WeChat.
(　　)6.A.chats B.chatted
C.is chatting D.was chatting
C
Beijing has made rapid progress and it is the first city to host both Summer and Winter Olympic Games.I think it is important to remember the past, live in the present and dream about the future.I hope I __7__ in Tsinghua University in three years.What about you
(　　)7.A.studied B.will study
C.have studied D.study
B
二、用所给动词的适当形式填空，每空词数不限
It 1._________________(know) that sweet dishes 2._______________(cool) with snow and ice in ancient times. These 3._______________(enjoy) by the rich and powerful such as Alexander the Great, the Egyptian Pharaohs, and the Emperor Nero.
Sorbets, or water ices, 4.______________(know) since the 16th century, when they 5._______________
(introduce) in Florence. However, real ice cream, made
is known　
were cooled　
were enjoyed
have been known　
were introduced
with fresh cream or milk, 6._____________(produce) for the first time in the 1630s by Gerald Tissain, the French chef of the British king, Charles I.
During the 18th century, ice cream 7._________
(eat) regularly at fashionable ice cream cafes in London, Paris and other great cities. It was still a great luxury(奢侈), though. It 8.________(know), for example, that George Washington spent ?$200 on ice cream in just two months in 1790.
was produced
was eaten　
is known
The cost 9._____________(reduce) when the first ice cream factory 10.____________(open) in 1851 by another American, George Fussel. Since the 19th century, though, it has been the Italians who 11.______________(see) as the great ice cream makers. In the mid 19th century, for example, ice cream 12.________________(sell) in the streets of London by as many as 30，000 Italians. The Italian methods 13.________________________(learn) by many others since those days, and so today excellent ice cream 14.________ (make) and 15.___________ (enjoy) all over the world.
was reduced　
was opened　
have been seen　
was sold　
have been learnt/learned
is made　
is enjoyed