文档内容
Unit 13 We’re trying to save the earth!
Section A 3a-4c 课后跟踪练习
Ⅰ.根据句意及首字母提示补全单词
1.I think it is ________(残忍的) to kill the animals.
2.2017·宿迁Most people in China couldn't ________(买得起) cars twenty years ago.
3.Reading in the sun is ________(有害的) to your eyes.
4.The government has made some ________(法律) to protect the wild animals.
5.About 70 million sharks are traded in this ________(行业) every year.
Ⅱ.根据汉语意思完成句子。
1.他们在山顶发现了一座古老的庙宇。
They found an old temple ________ ________ ________ ________ the mountain.
2.她不能再忍受这里的噪声了。
She can ________ ________ stand the noise here.
3.吸烟对你的健康没有好处。
Smoking is not ________ ________ your health.
4.该采取行动了，但我们还没有做好准备。
It's time to ________ ________， but we haven't got ready.
5.不仅他，而且我们也喜欢这首歌。
________ ________ he ________ ________ we are fond of the song.
III. 从方框中选出合适的短语，并用其适当形式填空。
pay for, turn off, be harmful to, cut off, so far, take part in
1.Please remember to ____________the computer when you don't use it. It is a way to save
energy.
2. We have learned twelve units ___________.
3. How much did you ___________ your books yesterday?
4. Have you ever ______________ an environmental project?
5. He had his finger _________ in an accident at work.
6. Junk food ________________ humans' health.
IV. 单项选择。
( )1. I am afraid we can not ________to take a taxi. Let's go by underground instead.A.refuse B. afford C. forget D. fall
( )2. It is said that the number of forest parks in Guangdong ________ to more than 1，
000 so far.
A.increase B. increased C. has increased D. will increase
( )3. Look at the picture. The top five TV plays ________ in it.
A.list B. are listed C. will list D. will be listed
( )4. —Can you tell me how long you ________ the Huawei mobile phone, Mr. Zheng?
—Nearly a year. It works very well.
A.will buy B. have had C. have bought D. had had
( )5.After dinner, he used to ________ computer games, but now he gets used to
________.
A.play; walk B. playing;walking C. play; walking D. playing; walk
( )6. ________ Lucy ________ you can't go to the party. One of you has to stay at home to
look after your grandma.
A.Neither; nor B. Either; or C. Not only; but also D. Both; and
( )7. ________ people prefer HUAWEI phones, and about ________ of them are adults.
A.The number of; fourfifths B. A number of; fourfifth
C. A number of; fourfifths D. The number of; fourfive
( )8. —Excuse me. Do you know________？
—Sorry, I don't know, either.
A.how to check out a book B.when will the concert begin
C.that there is a bank near here D.how long the meeting would last
V. 阅读理解
How do you deal with plastic bags from the supermarket? Throw them away or recycle them?
How about eating them?
The bags are no harmful to the environment. Humans and animals can safely eat them. Indian
company EnviGreen has made a bag with natural materials. It looks and feels just like plastic,
but can be broken down(分解) easily.
Ashwath Hedge who set up the EnviGreen company spent four years doing experiments(实验)
with 12 natural materials. They include potatoes, corn, vegetable oil and bananas. He made the
materials into liquid(液体) and used the liquid to make the bag.
Although the EnviGreen bag is more expensive than a common plastic bag, it has manyadvantages. According to The Wall Street Journal, it takes 1，000 years for common plastic
bags to break down. But an EnviGreen bag can naturally break down in less than 180 days. It
also breaks down in less than a day in water, and in less than a minute in boiling water. Hedge
was happy to show it in his interview; he put an EnviGreen bag in water and ate it with a
smile.
There are more than 15，000 tons of plastic waste in India every day. But only 9，000 tons
are processed. In China, 3 billion plastic bags are used every day. Maybe the EnviGreen bag
could be a solution(解决方法) to the world problem of plastic pollution.
( )1.According to Paragraph 2, we can know the following EXCEPT ________．
A.the EnviGreen bag can break down easily
B.the EnviGreen bag is made from natural materials
C.the EnviGreen bag can be eaten by humans and animals
D.the EnviGreen bag is a little harmful to the environment
( )2.The main idea of the third paragraph is “________”.
A.What Hedge thinks of the new bag
B.How Hedge makes the EnviGreen bag
C.Who sets up the EnviGreen company
D.How long it takes Hedge to make the bag
( )3.The underlined sentence in Paragraph 4 shows that the EnviGreen bag ________.
A.is safe and can break down quickly
B.is useful although it is more expensive
C.looks and feels like a common plastic bag
D.will be used more widely than a common bag
( )4.The EnviGreen bag breaks down fastest in ________．
A.hot air B. cold water C. boiling water D. natural air
( )5.From the last paragraph, we can infer(推断) ________．
A.all of India's plastic waste is processed
B.India has the most plastic waste in the world
C.China produces more plastic waste than India
D.the EnviGreen bag may help solve the problem of plastic pollution参考答案：
Ⅰ.根据首字母及汉语提示，完成下列句子。
1. cruel 4. laws
2. afford 5. industry
3. harmfulⅡ.根据汉语意思完成句子。
1.at the top of 4.take action
2.no longer 5.Not only; but also
3.good for
III. 从方框中选出合适的短语，并用其适当形式填空
1.turn off 4.taken part in
2.so far 5.cut off
3.pay for 6.is harmful to
IV. 单项选择
1-5 B C B B C 6-8 B C A
V. 阅读理解
1-5 D B A C D
