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【暑假闯关集训】复习Unit6
一、单项选择
1．You need to ________ on the computer before you start working.
A．power B．take C．put D．get
2．Wearing seat belts in cars is very important for our ________.
A．health B．safety C．happiness D．beauty
3．You ________ play with fire. It’s very dangerous.
A．mustn’t B．needn’t C．may not D．don’t have to
4．The ground is wet. There _________.
A．maybe rain B．maybe rainy C．may be rainy D．may be rain
5．She ________ because she wants to buy electricity in packets like sweets.
A．smells well B．looks foolish C．feels bad D．tastes bad
6．My teacher gave me a difficult math ________ to finish during the weekend. It was much harder than the usual class ________.
A．task; work B．work; task C．job; task D．task; job
7．The car was moving at a very high ________. We were all worried.
A．speed B．height C．weight D．price
8．The Internet ________ people all over the world. We can share information easily.
A．separates B．divides C．connects D．breaks
9．In modern society, many people only seem to ________ making money. They forget the importance of family.
A．care about B．think over C．look for D．get over
10．Monkey King is one of very famous symbols in Chinese ______ .
A．advice B．rule C．order D．culture
二、完成句子
11．气候变化影响我们的星球，所以我们应该现在采取行动。
affects our planet, so we should now.
12．他驾驶着电动汽车以每小时100公里的速度行驶。
He is driving an electric car 100 kilometers per hour.
13．我们不得不用手洗所有的衣服，这花了我们很多时间。
We wash all our clothes , and this us a lot of time.
14．我们可以用水、风还有阳光来发电。
We can use water, wind and sunlight to .
15．现如今，孩子们喜欢在家玩电子游戏。
At present, children like at home.
16．昨天我的钱用完了。
I my money yesterday.
17．我们一定要小心用电。
We with electricity.
三、语法选择
In the early 1800s, the first electric light was made. But there was no good way to get electricity into homes. Two men began working to develop 18 electric generator (发电机). One was the famous Thomas Edison. 19 was a young man 20 Nikola Testa.
Testa was born in Croatia in 1856 and moved to America in 1884. He 21 Thomas Edison and worked with him in Edison’s company. Edison had developed a generator that made direct current-DC (直流电). His generator already 22 light a small area of New York City. Testa helped Edison 23 his DC generator better. But he did not stay with Edison very long. Testa thought there was a better way of 24 electricity.
Nikola Testa knew more about electricity than almost anyone. Testa did not invent the AC generator. 25 he believed alternating current-AC (交流电), was 26 way to power homes.
He went to work 27 a large electric company. He developed AC generators to power homes and businesses. Tesla was on his way to great 28 .
Edison fought against Tesla’s AC generators because he was not happy. He told everyone that AC would kill people. It was true that AC was 29 than DC． But DC had 30 own problems. It could not be sent far from the generator. AC, on the other hand, could be sent very far. Finally Nikola Tesla was a great 31 , and 32 his inventions, now the whole world has electricity.
18．A．a B．an C．the D．\
19．A．others B．the other C．other D．another
20．A．name B．named C．names D．naming
21．A．join B．joins C．joined D．joining
22．A．may B．must C．should D．could
23．A．makes B．made C．make D．making
24．A．producing B．produce C．produced D．produces
25．A．and B．but C．or D．so
26．A．good B．better C．best D．the best
27．A．at B．on C．for D．to
28．A．success B．succeed C．successful D．successfully
29．A．dangerous B．much dangerous C．more dangerous D．the most dangerous
30．A．it B．it’s C．its D．its’
31．A．invent B．invention C．inventer D．inventor
32．A．because B．because of C．because for D．because to
四、完形填空
Electricity is very useful for us. It plays a very 33 role in our life today. It can bring us light, heat and so on. We cannot live without it. It 34 our lives. So how can we use electricity 35 First, we must be 36 with it and can’t put the electrical appliance near the fire. Then, we can’t also 37 it with wet hands because we may get an electric shock (电击). It is very 38 .
In our country, we have used electricity for many 39 . It is a long time. But we have to know, at the same time, we waste a large part of it. Producing it also 40 the environment around us. As a student, we should use the air conditioner less often and turn off the lights when we leave the room and not sleep with the lights on. As a 41 goes, “Actions speak louder than words.” Please 42 in the action to save electricity from now on.
33．A．interesting B．important C．useless D．active
34．A．changes B．returns C．ends D．starts
35．A．quickly B．slowly C．safely D．easily
36．A．careful B．useful C．hopeful D．helpful
37．A．leave B．touch C．throw D．eat
38．A．difficult B．strong C．dangerous D．delicious
39．A．days B．weeks C．months D．years
40．A．protects B．saves C．pollutes D．improves
41．A．saying B．hearing C．feeling D．thinking
42．A．meet B．arrive C．connect D．join
五、阅读理解
A
What would you like for lunch Maybe, a battery (电池) Although it sounds unusual, this has already been realized by scientists as they develop electronic things you can eat.
Robofood, led by Dario Floreano from a Swiss Institute, has created a new drone (无人机) with scientists from Wageningen University, the Netherlands. Half of the parts inside can be eaten! The program aims to (旨在) make robots that can be eaten and foods that act like robots by mixing food science and robots in a new way.
The drone’s wings are made from rice cakes glued together with oil and chocolate. It can find missing people or animals in emergencies (紧急情况) and send food or medicine. Parts of the drone can be eaten because they meet food safety standards for emergencies set by the United Nations.
However, the main challenge is finding stronger edible (可食用的) materials for the drone’s wings to prepare for bad weather and high temperatures—of course, the chocolate may melt (融化) easily.
Robofood also developed an edible sensor (感应器) to help monitor (监控) stomach sickness. It’s eaten by the patient to check the conditions inside. It’s different from other sensors because it’s easy for your body to digest (消化), so it won’t leave any remains inside the body.
The invention of Robofood also helps with environmental protection. There are batteries that you can fully eat. They are made from natural things like vitamin B2 and elements (元素) found in fruits. This helps the environment because you won’t have to throw them away like other batteries.
43．What is Robofood’s main goal
A．To develop smart drones. B．To create edible electronics.
C．To help check stomach disease. D．To put sensors on drones.
44．What problem does Robofood’s drone have
A．The drone can easily break during flying.
B．The drone cannot take off in bad weather.
C．The materials are not strong enough.
D．The materials cannot easily melt.
45．Compared to other sensors for checking the stomach, Robofood’s sensors _____.
A．can be safer for health B．can check more carefully
C．can stay in the human body longer D．can be taken as medicine
46．Why is Robofood’s battery good for nature
A．It uses less power. B．It cuts down pollution.
C．It uses solar power. D．It is made from food waste.
47．Which of the following best describes the main idea of the passage
A．Robots can help people in emergencies by sending food and medicine.
B．Edible batteries are invented to protect the environment.
C．Scientists from different countries work together to develop new technology.
D．Robofood creates new robots and sensors that are mainly made of edible materials.
B
It’s there, but it has no weight, no colour, and you can’t smell it. You can’t see it, but it’s working everywhere in our modern world. Don’t try to touch it! It’s dangerous. It has always existed, but humans learned about it only 500 years ago.
What is it Electricity. It’s powerful and mysterious. Thanks to electricity, you can flick a switch (开关) and have light. Watched a good TV show lately You couldn’t do that without electricity. We cook our food, heat our homes and run our computers using electricity. But what is it, really
Here is a simple description. Everything in the world is made of atoms (原子). Atoms are small. You can fit millions of them on the head of a pin. In every atom, there are electrons (电子), protons (质子) and neutrons (中子). In some atoms, it is possible to move electrons easily from one atom to another. As the electrons move, a current (电流) is created. This is electricity.
Don’t worry if you don’t understand it fully. Just remember that electricity is the result of the movement of electrons. As the electrons move, they create a strong electric charge.
There are many ways to generate electricity. A machine called a generator spins (旋转) rapidly. Water and wind can make a generator spin. So can motors fuelled by oil. As the generator spins, the electrons begin to move. As they move, they create an electric current. Power lines (电线) are built from generators to carry this current to places where people can use it. Along your street, power lines bring electricity right to your door. A wire runs into your house. More wires inside your house are attached to the plugs. Plug in your lamp, the electricity lights up the bulb, and you have light!
It takes a lot of energy to make electricity. Oil is one of the main fuels (燃料) used to power electric generators. Another common fuel is coal. Our planet is running out of these resources, and using them creates a lot of pollution.
In the future, most electricity will be produced using the sun and wind. But for now, be careful about how much electricity you use. Don’t forget to turn off the lights when you leave a room. Every little bit helps.
48．The writer mentions atoms in the third paragraph to ________.
A．show the relationship between electricity and atoms
B．explain what the electricity is
C．tell us everything in the world is made of atoms
D．describe how the electrons move
49．What can we know about the discovery of electricity from the passage
A．It was accidentally found by scientists 500 years ago.
B．Humans always knew about electricity but couldn’t use it.
C．Its existence was recognized relatively recently in history.
D．Electricity became widely used immediately after its discovery.
50．Why does the author explain the structure of atoms in the passage
A．To prove that atoms are the smallest particles in the universe.
B．To show the relationship between electron movement and electricity.
C．To explain why some atoms are more dangerous than others.
D．To compare the functions of electrons, protons, and neutrons.
51．What problem with current electricity production does the author mean
A．Generators are too expensive to build and maintain.
B．Renewable energy sources are not yet available.
C．Dependence on oil and coal causes environmental issues.
D．The demand for electricity exceeds the supply worldwide.
52．What might be the best title for the passage
A．How to make electricity. B．How electricity helps us.
C．Electricity—A Natural Force. D．Save the energy; Save the world.
C
Electricity is an important part in our life. We can’t see or touch it, but it is all around us. 53 But some people don’t know that everyone should save electricity. When it is not completely dark, many street lamps (路灯) light up early in some streets of places. 54 Some people are sleeping with the lights on. They are all wrong. Here I make some suggestions about stopping these things.
1. 55 We light them from 7:00 p.m.—5:30 a.m. in summer, and from 5:30 p.m.—6:00 a.m. in winter.
2. If some small areas are very dark, just turn on a few lights.
3. The distance (距离) between street lamps can be 50—60 meters. 56
4. If there are some activities, we can make the lights bright, if there is no activity, lights needn’t be too bright.
5. Ask people to save electricity through TV shows, newspapers, and so on.
Electricity is a valuable resource (资源). It helps us live well and conveniently. 57
A．Our life will be terrible without electricity.
B．It can save electricity and money.
C．Turn on the street lamps on time.
D．Some people don’t turn off the lights when they leave the room.
E．We should take action to save it at once!
六、短文填空
阅读短文，根据上下文和所给的首字母写出所缺单词。注意使用正确形式，每空限填一词。
In order to protect our Earth, people set up Earth Hour. It s 58 on 31 March in 2007. And now it is always on the last Saturday of March every year. On this day, millions of people will s 59 off their lights, staying in darkness for one hour. Some of them also give up using other electrical appliances, for e 60 , air conditioners, TVs, and computers. They do this to s 61 electricity.
Earth Hour is not only about cutting down the use of electricity, but also about showing care for our beautiful p 62 — the Earth. We share it with other animals and plants. We should protect it!
七、书面表达
63．你的老师 Miss Lin 要求你们以小组为单位写一篇主题为保护动植物的倡议性文章，以下是你们小组成员的观点，请根据以下表格要点提示，适当发挥完成作文。
Protect Man’s Best Friends
Jim 动物帮助我们做很多事，比如帮助盲人；
Anna 植物清新空气，使生活更便利；
你的观点 动物（请补充至少一个点） 植物（请补充至少一个点）
你们的倡议 倡议 1：停止砍伐树木 倡议 2：请补充至少一个点
注意：作文必须包括表格所有信息；词数：70 词左右；不得透露学校、姓名等任何个人信息，否则不予评分。
Protect Man’s Best Friends
Animals and plants are our best friends. They help us a lot in our daily lives.
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/ 让学习更有效 暑假打卡计划 | 英语学科
试卷第1页，共3页
试卷第1页，共3页
参考答案
1．A
【详解】句意：在开始工作前，你需要打开电脑。
考查动词短语辨析。power on打开 (电源)，启动；take on承担 (责任)，呈现 (面貌)；put on穿上，上演；get on上车，进展。根据“on the computer before you start working”可知，此处是指在开始工作前需要打开电脑。故选A。
2．B
【详解】句意：系安全带是为了保障我们在乘车时的安全。
考查名词词义辨析。health健康；safety安全；happiness幸福；beauty美丽。根据“Wearing seat belts in cars is very important for our...”与常识可知，系安全带的目的是保障安全，故“safety”符合题意，故选B。
3．A
【详解】句意：你不准玩火。它非常危险。
考查情态动词的用法。mustn’t 不准；needn’t 不必；may not 可能不；don’t have to 不必。根据“It’s very dangerous”可知，玩火是非常危险的，因此应该不准玩火，故选A。
4．D
【详解】句意：地面湿了。可能是下雨了。
考查情态动词may的用法及There be句型。maybe是副词，需修饰整个句子，不能直接与名词rain或形容词rainy连用，所以排除选项A和B；“There may be+名词”表示“可能有某物”，所以空处应选may be rain。故选D。
5．B
【详解】句意：她看起来很傻，因为她想像买糖果一样成包地买电。
考查动词短语辨析。smells well闻起来不错；looks foolish看起来很傻；feels bad感觉不好；tastes bad味道不好。根据“she wants to buy electricity in packets like sweets”可推知，想像买糖果一样成包地买电的人看起来很傻。故选B。
6．A
【详解】句意：我的老师给了我一道很难的数学题，让我在周末完成。它比平时的课堂作业难多了。
考查名词辨析。task任务；work工作；job职业。task侧重于被分配、指定去完成的具体事项，a difficult math task指具体的数学任务，符合语境；work作不可数名词时，可表示“工作；活计”，class work是常见搭配，强调在课堂相关的学习任务；job是可数名词，主要指一份职业、工作，用在此处不合适。故选A。
7．A
【详解】句意：汽车正以很高的速度行驶。我们都很担心。
考查名词辨析。speed速度；height高度；weight重量；price价格。根据“The car was moving at a very high..., We were all worried.”可知，这里是说汽车的速度很快，让人担心。at a high speed“以很高的速度”，固定搭配。故选A。
8．C
【详解】句意：互联网把全世界的人们连接起来，使得我们能够轻松地分享信息。
考查动词辨析。separates分开；divides划分；connect连接；breaks打破。根据“We can share information easily.”“可知，我们能够轻松地分享信息，说明此处应该是“把全世界的人们连接起来”，connect符合语境，故选C。
9．A
【详解】句意：在现代社会，许多人似乎只关心赚钱。他们忘记了家庭的重要性。
考查动词短语词义辨析。care about关心，在意；think over仔细考虑；look for寻找；get over克服，恢复。根据“many people only seem to...making money. They forget the importance of family.”可知，这里表达许多人只在乎赚钱，而忘记家庭重要性，care about符合语境。故选A。
10．D
【详解】句意：孙悟空是中国文化中最著名的象征之一。
考查名词辨析。advice建议；rule规则；order命令；culture文化。根据“Monkey King is one of very famous symbols”可知 ，孙悟空是中国文化中最著名的象征之一。故选D。
11． Climate change take action
【详解】第一空：根据中英文对照，空格处缺“气候变化”。英文对应“Climate change”；根据“affects”可知，此处填名词单数；第二空：根据中英文对照，空格处缺“采取行动”。英文对应“take action”；“should”后填动词原形。故填Climate；change；take；action。
12． at a speed of
【详解】以……速度：at a spend of，介词短语。故填at；a；speed；of。
13． had to by hand took
【详解】对比中英文可知，空处缺少“不得不”、“用手”和“花了”；根据英文题干和汉语提示可知，此处考查have to“不得不”，句子陈述过去发生的事情，时态应用一般过去时，这里应用过去式had；by hand“用手”，介词短语；take“花费”，动词，这里应用过去式took。故填had；to；by；hand；took。
14． produce electricity
【详解】根据中英文对照可知，英文句子缺少“发电”，英文表达是produce electricity，动词produce位于动词不定式符号to之后，所以produce保持原形。故填produce；electricity。
15． playing video games
【详解】根据中英文对比可知，缺少“玩电子游戏”，英文表达为play video games；like doing sth.意为“喜欢做某事”，故填playing；video； games。
16． ran out of
【详解】run out of sth.表示“用完了某物”，根据“yesterday”可知要用一般过去时，动词应用过去式。故填ran；out；of。
17． must be careful
【详解】根据中英文对照可知，句中缺少“一定小心”的英文内容，must“一定”，后接动词原形，be careful“小心”。故填must；be；careful。
18．B 19．B 20．B 21．C 22．D 23．C 24．A 25．B 26．D 27．C 28．A 29．C 30．C 31．D 32．B
【导语】本文讲述了19世纪初期，托马斯·爱迪生和尼古拉·特斯拉在电力发展中的贡献，特别是他们在直流电和交流电发电机方面的竞争与合作。
18．句意：两个人开始研发一种发电机。
a一个；an一个；the这个；\无。根据“Two men began working to develop…electric generator”可知，这里指的是研发一种发电机，且“electric”以元音开头，故选B。
19．句意：另一个人是一个叫尼古拉·特斯拉的年轻人。
others其他人；the other另一个；other其他的；another另一个。根据“One was the famous Thomas Edison…was a young man”可知，这里指的是两个人中的另一个，故选B。
20．句意：另一个人是一个叫尼古拉·特斯拉的年轻人。
name名字，名词；named名叫，过去分词；names名字，名词复数；naming命名，动名词或现在分词。根据“…was a young man…Nikola Testa”可知，这里指的是名叫尼古拉·特斯拉的年轻人，故选B。
21．句意：他加入了托马斯·爱迪生，并在爱迪生的公司工作。
join加入，动词原形；joins加入，三单形式；joined加入，过去式；joining加入，现在分词或动名词。根据“He…Thomas Edison and worked with him in Edison’s company”可知，这里指的是过去加入爱迪生，故选C。
22．句意：他的发电机已经能够照亮纽约市的一小片区域。
may可能；must必须；should应该；could能够。根据“His generator already…light a small area of New York City”可知，这里指的是发电机能够照亮，故选D。
23．句意：特斯拉帮助爱迪生改进他的直流发电机。
makes制作，三单形式；made制作，过去式；make制作，动词原形；making制作，现在分词或动名词。根据“Testa helped Edison…his DC generator better”可知，这里指的是帮助改进，help sb. do sth“帮助某人做某事”。故选C。
24．句意：特斯拉认为有一种更好的发电方式。
producing生产，现在分词或动名词；produce生产，动词原形；produced生产，动词过去式或过去分词；produces生产，动词三单形式。根据“Testa thought there was a better way of…electricity”可知，这里指的是发电的方式，介词of后接动名词。故选A。
25．句意：但他相信交流电是更好的供电方式。
and和；but但是；or或者；so所以。根据“Testa did not invent the AC generator…he believed alternating current-AC, was…way to power homes”可知，这里表示转折，故选B。
26．句意：但他相信交流电是更好的供电方式。
good好；better更好；best最好；the best最好的。根据“he believed alternating current-AC, was…way to power homes”可知，这里指的是最好的给家庭供电的方式，故选D。
27．句意：他去了一家大型电力公司工作。
at在；on在；for为；to到。根据“He went to work…a large electric company”可知，这里指的是为一家大的电力公司工作，故选C。
28．句意：特斯拉正走向伟大的成功。
success成功，名词；succeed成功，动词；successful成功的，形容词；successfully成功地，副词。根据“Tesla was on his way to great…”可知，这里指的是成功，用名词作宾语。故选A。
29．句意：交流电确实比直流电更危险。
dangerous危险的；much dangerous非常危险；more dangerous更危险；the most dangerous最危险。根据“It was true that AC was…than DC”可知，这里指的是更危险，than提示用比较级。故选C。
30．句意：但直流电也有它自己的问题。
it它；it’s它是；its它的；its’无此形式。根据“But DC had…own problems”可知，这里指的是直流电自己的问题，修饰名词用形容词。故选C。
31．句意：最终，尼古拉·特斯拉是一位伟大的发明家，因为他的发明，现在全世界都有了电。
invent发明，动词；invention发明，名词；inventer无此词；inventor发明家。根据“Finally Nikola Tesla was a great…”可知，这里指的是发明家，故选D。
32．句意：最终，尼古拉·特斯拉是一位伟大的发明家，因为他的发明，现在全世界都有了电。
because因为；because of因为；because for无此用法；because to无此用法。根据“…his inventions, now the whole world has electricity”可知，这里指的是因为他的发明，后接名词的是because of。故选B。
33．B 34．A 35．C 36．A 37．B 38．C 39．D 40．C 41．A 42．D
【导语】本文是一篇说明文。文章主要讲了电对我们很有用，在生活中作用重大且改变了我们的生活，接着阐述安全用电的方法、我国用电时间长但存在浪费及污染环境问题，最后呼吁大家加入节约用电行动。
33．句意：如今，它在我们的生活中起着非常重要的作用。
interesting有趣的；important重要的；useless无用的；active积极的。结合前文“Electricity is very useful for us.”可知电在我们生活中起着重要作用，故选B。
34．句意：它改变了我们的生活。
changes改变；returns返回；ends结束；starts开始。电给我们带来光、热等，确实改变了我们的生活，故选A。
35．句意：那么我们如何安全地使用电呢？
quickly快速地；slowly缓慢地；safely安全地；easily容易地。后文提到不能把电器放在火旁等，都是在说安全用电，故选C。
36．句意：首先，我们必须小心使用电，不能把电器放在火的附近。
careful小心的；useful有用的；hopeful充满希望的；helpful有帮助的。不能把电器放在火旁，说明要小心用电，故选A。
37．句意：然后，我们也不能用湿手触摸电器，因为我们可能会触电。
leave离开；touch触摸；throw扔；eat吃。我们不能用湿手触摸电器，否则可能触电。故选B。
38．句意：这是非常危险的。
difficult困难的；strong强壮的；dangerous危险的；delicious美味的。用湿手触摸电器可能触电，所以这是很危险的。故选C。
39．句意：在我们国家，我们已经使用电很多年了。
days天；weeks周；months月；years年。根据“It is a long time.”，所以这里应该是说在我们国家，我们使用电很多年了。故选D。
40．句意：生产电也会污染我们周围的环境。
protects保护；saves拯救；pollutes污染；improves提高。前面说我们浪费了大量电，这里说发电也会对环境有不好影响，应该是污染环境。故选C。
41．句意：正如一句谚语所说：“行动胜于言语。”
saying谚语；hearing听见；feeling感觉；thinking想法。“Actions speak louder than words.”这是一句谚语，所以用saying。故选A。
42．句意：从现在开始，请参加到节约用电的行动中来。
meet遇见；arrive到达；connect连接；join参加。这里是呼吁大家从现在开始参加到节约用电的行动中来。“join in”是固定短语，意为“参加”。故选D。
43．B 44．C 45．A 46．B 47．D
【导语】本文介绍了Robofood团队通过融合食品科学与机器人技术，开发出可食用无人机、传感器和电池等创新产品，旨在实现电子设备可食用化并兼顾环保功能的研究成果。
43． 细节理解题。根据“The program aims to (旨在) make robots that can be eaten and foods that act like robots by mixing food science and robots in a new way.”可知，Robofood旨在制造出可食用的电子产品。故选B。
44．细节理解题。根据“However, the main challenge is finding stronger edible (可食用的) materials for the drone’s wings to prepare for bad weather and high temperatures—of course, the chocolate may melt (融化) easily.”可知，Robofood的无人机材料不够坚固。故选C。
45．细节理解题。根据“It’s different from other sensors because it’s easy for your body to digest (消化), so it won’t leave any remains inside the body.”可知，与其他检查胃部的传感器相比，Robofood的传感器对人体更安全。故选A。
46．细节理解题。根据“The invention of Robofood also helps with environmental protection. There are batteries that you can fully eat.”以及“They are made from natural things…This helps the environment because you won’t have to throw them away like other batteries.”可知，Robofood的材料对大自然有益是因为它减少了污染。故选B。
47．主旨大意题。通读文章可知，核心主题是Robofood开发以可食用材料为主的机器人及传感器（如无人机、电池、胃部传感器）。故选D。
48．B 49．C 50．B 51．C 52．A
【导语】本文主要介绍了什么是电，以及发电有很多种方法及提倡节约用电。
48．段落大意题。通读第三段尤其是第一、二句“Here is a simple description. Everything in the world is made of atoms.”及最后一句“This is electricity.”可知，作者在第三段提到原子是为了解释电是什么。故选B。
49．推理判断题。根据第一段最后一句“It has always existed, but humans learned about it only 500 years ago.”可知，电一直存在，但人类在500年前才知道它，说明人类对电的认知是在相对较近的历史时期才出现的，则选项C“它的存在在历史上是最近才被认识到的”表述正确。故选C。
50．推理判断题。根据第三段中介绍了原子结构后指出 “As the electrons move, a current is created. This is electricity.”可知，解释原子结构是为了说明电子运动产生电流，从而解释电的本质。故选B。
51．推理判断题。根据倒数第二段“It takes a lot of energy to make electricity…Our planet is running out of these resources, and using them creates a lot of pollution.”可知，当前依赖化石燃料发电会导致污染和资源枯竭，则作者是指当前电力生产将导致对石油和煤炭的依赖，造成环境问题。故选C。
52．最佳标题题。通读全文，本文主要介绍了什么是电，以及发电有很多种方法及提倡节约用电，选项A“如何发电”符合。故选A。
53．A 54．D 55．C 56．B 57．E
【导语】本文主要讲述了电的重要性以及节约用电的具体建议。
53．根据“Electricity is an important part in our life. We can’t see or touch it, but it is all around us.”可知，此处介绍电的重要性，选项A “没有电，我们的生活将非常糟糕。” 符合语境。故选A。
54．根据“When it is not completely dark, many street lamps (路灯) light up early in some streets of places.”可知，此处是介绍浪费电的具体例子，选项D“有些人离开房间时不关灯。”符合语境。故选D。
55．根据“We light them from 7:00 p.m.-5:30 a.m. in summer, and from 5:30 p.m.-6:00 a.m. in winter.”可知，是介绍打开灯的时间，选项C “按时开启路灯。”符合语境。故选C。
56．根据“The distance (距离) between street lamps can be 50-60 meters.”可知，空处应介绍路灯设置在50到60米之间的原因，选项B“这能节约电力和金钱。”符合语境。故选B。
57．根据“Electricity is a valuable resource (资源). It helps us live well and conveniently.”可知，电是宝贵的资源，有助于我们生活得更好、更便利，因此我们应该采取行动节约用电，选项E“我们应立即行动节约用电！”符合语境。故选E。
58．(s)tarted 59．(s)witch 60．(e)xample 61．(s)ave 62．(p)lanet
【导语】本文主要介绍了地球一小时活动。
58．句意：它始于2007年3月31日。根据语境并结合首字母可知空处应用start；句子时态为一般过去时，谓语动词应用过去式，故填(s)tarted。
59．句意：在这一天，数百万人将关掉他们的灯，在黑暗中停留一小时。由“staying in darkness”可知此处表示关灯，switch off“关掉”，will后应用动词原形。故填(s)witch。
60．句意：他们中的一些人还放弃使用其他电器，例如空调、电视和电脑。根据“air conditioners, TVs, and computers.”和首字母提示，此处是举例说明，for example“例如”，表示举例说明。故填(e)xample。
61．句意：他们这样做是为了节省电力。根据句意和首字母提示可知，此处表示节约用电，save“节省，节约”，动词不定式符号to后面跟动词原形。故填(s)ave。
62．句意：地球一小时不仅仅是减少电力的使用，更是关心我们美丽的星球——地球。根据“the Earth”可知，此处表示“星球”，planet“行星，地球”，用单数形式。故填(p)lanet。
63．例文
Protect Man’s Best Friends
Animals and plants are our best friends. They help us a lot in our daily lives.
Jim thinks animals do many things for us, such as helping blind people. Anna believes that plants can make the air clean and fresh. And they make our lives more convenient. As for me, animals are so lovely that they always make us happy and plants provide us with food as well.
It is important for us to protect our best friends. It’s time to take action. First, stop cutting down trees. Second, don’t throw rubbish everywhere to keep the environment clean. Let’s work together to protect them.
【详解】[总体分析]
题材：本文是一篇材料作文；
时态：时态主要为“一般现在时”；
提示：写作要点已给出，考生应注意不要遗漏“表格要点提示”中的信息，适当添加细节，并突出写作重点。
[写作步骤]
第一步，开篇点题，表明动植物是人类最好的朋友；
第二步，具体阐述各自关于保护动植物的观点；
第三步，提出呼吁行动，书写结语。
[亮点词汇]
①such as例如
②convenient方便的
③provide...with...为……提供……
[高分句型]
①Jim thinks animals do many things for us, such as helping blind people. (省略that的宾语从句)
②As for me, animals are so lovely that they always make us happy and plants provide us with food as well. (so... that引导的结果状语从句)
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