(新课标)Unit 13 We're trying to save the earth Section A 3a-3b 语言点精讲精练(含答案)

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Unit 13 SectionA3a-3b语言点精讲精练
I．语言点精讲
1. This method is not only cruel, but also harmful to the environment.
这种方法不但残忍而且对环境有害。
not only…but also…
(1)用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅……而且……”; 其中的also有时可以省略。
e.g. She not only plays well, but also writes music.Not only men but also women were chosen.
(2)若连接两个成分作主语，其谓语通常与靠近的主语保持一致。
e.g. Not only you but also he has to leave. 不只是你，他也得离开。
(3)not only放在句首，后接句子时要用倒装结构。
e.g. Not only had the poor man been fined, but also he had been sent to prison.
这个可怜的人不仅被罚款，而且还被送进了监狱。
2. A shark can no longer swim and slowly dies. 鲨鱼不能再游泳然后慢慢死掉。
no longer意思是“不再”
e.g. I’m no longer a student.我不再是个学生了。
有两个短语和no longer同义，即not…any longer和not…any more，但他们侧重的方面不同。
no longer和not…any longer侧重时间。
e.g. He no longer lives here. = He doesn’t live here any longer.
他不在这儿居住了。(一个时间以前他住在这儿，过了这个时间，他就离开了。)
not…any more侧重程度和数量
e.g. You can drink no more. = You can’t drink any more.
你不能再喝了。(喝酒的量到了一定程度，不能再继续下去了。)
The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
“the numbers of... ”是“the number of…”的复数形式。
The numbers of different kinds of flowers are growing quickly.
【易混辨析】the number of...与a number of...
the number of... ……的数量
“the number of+可数名词复数”作主语时，谓语动词用单数形式。
a number of...一些；许多“a number of+可数名词复数”作主语时，谓语动词用复数形式。
A number of measures have been taken to protect wild animals because the number of them has become smaller and smaller.
“fall by” 意为“下降了”，by表示变化的幅度。fall to意为“下降到”。
Last year, the price of this kind of car was 100, 000 yuan. This year it falls to 80, 000 yuan. It falls by 20 percent.
II．语言点精练
一、单项选择
(　　)1. I don't want to do anything ______ to you. Stay away from me, OK
A. useful B. careful C. harmful D. helpful
(　　)2. The electricity had been ______ because of the lightning.
A. cut off B. cut down C. cut up D. cut in
(　　)3. Have you heard ______ this famous teacher in our city His name is Mand.
A. over B. from C. of D. through
(　　)4. There are ______ number of ducks swimming on the lake. ______ number of them is 200.
A. a; An B. the; A C. the; An D. a; The
(　 )5. Don't forget ______ thanks when other people help you.
A. accept B. to accept C. say D. to say
二、用括号中所给单词的适当形式填空
6.Greenhouse gases are 　　　　(harm) to the environment.
7.So far, no 　　　　(science) studies have shown that shark fins are good for health.
8.Buying things that are 　　　　(usable) can help protect the environment.
9.Our biology teacher often takes us to the field to know about different 　　　　(ecosystem).
10.I don’t like the man with gold 　　　　(chain).
三、根据汉语及英语提示，完成下列句子，每空一词。
11.他的中指工作时不小心被机器切掉了。
His middle finger 　　　　accidentally 　　　　　　　　by the machine while working.
12.事实上,它将给所有的海洋生物带来危害。
　　　　 　　　　, it will 　　　　danger to all ocean life.
13.记住我们是食物链的一部分。
Remember that we are part of the　　　　 　　　　.
14.据说转基因食品对人类健康有害。
It’s said that the GMF 　　　　　　　　　　　　human health.
15.长颈鹿能够到树顶的叶子。
A giraffe can reach the leaves 　　　　　　　　　　　　　　　　the trees.
四、完形填空
Last Sunday, we had a class trip to enjoy ourselves.Our head teacher took us to the beach for a 　16　.When we arrived there at 9:00 a.m.by bus, we heard a big 　17　.It was made by the wind and the waves(海浪).It sounded like they were playing wonderful symphony(交响乐).Right away, we sat down and 　18　 to enjoy our picnic.We told jokes, sang and played games while eating sandwiches, chocolate and other kinds of food.
In the afternoon, some students　19　 in the water and swam for fun.Alice and I tried to 　20　fish in the water.Some students 　21　 the cleaners pick up the rubbish.Others played cards and chess.Everyone looked very 　22　.
At 4:30 p.m., we had to go back to school, 　23　 we wanted to spend some more time on the beach.Just then, I found a blue hairband(发带) on the sand.“I think Alice 　24　it,” Sam said, “because she likes the blue color.” But I thought it couldn’t belong 　25　 her because I saw her wearing a yellow one.At last, we knew it was Cindy’s.We went back to school at 5:45 p.m.The picnic came to an end, but we’ll always remember the good time we had.
(　　)16.A.picnic B.camp C.sport D.party
(　　)17.A.accident B.sound C.story D.problem
(　　)18.A.asked B.refused C.started D.agreed
(　　)19.A.fought B.slept C.studied D.played
(　　)20.A.bring B.catch C.buy D.lift
(　　)21.A.joined B.allowed C.helped D.told
(　　)22.A.happy B.hungry C.worried D.tired
(　　)23.A.because B.although C.unless D.when
(　　)24.A.got B.found C.dropped D.took
(　　)25.A.to B.for C.with D.on　
五、阅读理解
You may have heard the saying “The Yangtze River is China’s mother river.” It’s almost 6,400 kilometers long. As the world’s third-longest river, it covers one-fifth of China’s land area. The Yangtze River Economic Zone(长江经济带) covers eleven provinces and cities, making up about 40 percent of China’s total population and GDP.
On December 26, China passed the Yangtze River Protection Law, which came into force on March 1, 2021. It is the first law to protect a waterway in China.
The mother river is in great need of protection because something is wrong with it. For example, because of overfishing and water pollution, the river’s Chinese paddlefish has died out there. There’s also desertified land and soil pollution near the river.
According to the law, fishing will not be allowed in all of the Yangtze’s natural waterways, including its major tributaries(支流) and lakes. Those who are caught fishing will be fined(罚款) 50,000 to 500,000 yuan.
Digging sand will be strictly limited(限制) in the river. Many companies are digging sand along the river. However, this has led to lower water levels on the river, which has caused the river’s water to decline.
Companies and factories along the river will need to focus on green development. If their activities do harm to the waterways, they will be moved away, the law says.
(　　)26.What does the first paragraph tell us about the Yangtze River
A.How old it is. B.Why it’s important. C.What problems it has. D.Where it joins the sea.
(　　)27.What do we know about the Yangtze River Protection Law
A.It was passed on March 1, 2021.
B.It came into force about ten years ago.
C.It has increased the population of the area.
D.It’s the first law to protect a waterway in China.
(　　)28.What does Paragraph 3 explain
A.Why the river needs protection. B.How the river is being polluted.
C.When Chinese paddlefish died out. D.How the river will be protected.
(　　)29.What does the word “decline” in Paragraph 5 mean
A.Disappear. B.Become worse. C.Be hard to test. D.Be easy to control.
(　　)30.According to the passage, which is true about protecting the river
A.People can’t fish in the river’s major tributaries.
B.Digging sand will not be allowed in the river anymore.
C.Companies along the river will be moved to other places.
D.Anyone who causes pollution will be fined at least 50,000 yuan.
II. 语言点精练参考答案
一、1-5 CACDD
二、6.harmful　7.scientific 8.reusable　9.ecosystems 10.chains
三、11.was; cut off　12.In fact; bring 13.food chain　14.is harmful to/is bad for 15.at the top of
四、16-20 ABCDB 21-25 CABCA
五、26-30 BDABA
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