Let's say you are taking a walk along the road and you happen to see one or two waste bottles lying on the grass beside the road． What would you do？
You may have different choices． Firstly ，you can leave the bottles there as they are． It was not you who threw them away． Why should you do something about it？ This is quite OK． Secondly， you can pick them up and throw them into a dustbin （垃圾箱）． By doing this，you have walked a step further to help make our homeclean． This action is a better choice． Thirdly， you might want to pick them up and give them to an old man or woman who collects waste for a living． If this is your choice， you have walked even further． You're not only thinking about doing something for the environment， you're also developing yourself to be a person who would think of others and help them．
As for young kids， they may always have such a question："When do I grow up？"Yes! When does a child grow up？ And how can a kid know he or she has grown up？These are interesting questions．As for us，fifteen﹣year﹣olds，who are finishing middle school， we're no longer younger children．We should know whether or not we have grown up． When we start to have a sense of offering a helping hand for a cleaner city and greener world， and when we have a loving heart to think more of others than of ourselves and are ready to help them， we can say that we have grown up．
Remember： If we help others， others will help us． If we do our best for nature， nature will offer its best to us in return !
（1）How did the writer start the passage？
The writer did it by giving a（n） of daily life．
（2）How many choices are there in the second paragraph？
There are choices．
（3）What does it mean when you pick up the waste bottles and give them to someone else？
It is a sign that you're a person that has grown up．
（4）What does the underlined word "home" refer to in the second paragraph？
It refers to the " " we live in．
（5）How did the writer support the main idea in the passage？
The writer used as an example to support the idea．
（1）We found that only fifteen percent of our students exercise every day．Forty﹣five percent exercise four to six times a week． Twenty percent exercise only one to three times a week． And twenty percent do not exercise at all!
（2）If you go without sleep， you might have problems with your memory or with your concentration（注意力）．In order to concentrate at school or perform well in tests， we really need to get a good night's sleep．
（3）Dr． Green says all these activities can cause a lot of stress for children． "Kids should have time to relax and think for themselves， too． Although it's normal to want successful children， it's even more important to have happy children．
（4）Yes， you knew I was going to say this! It is so important． Smoking is not cool． It is dangerous． It harms nearly every part of your body． Think about how your family and friends will feel， and think about what it will do to your health．
（5）I have never been very active， and I do not like sports． I have always wanted a pet， so my parents gave me a dog for my birthday． Now I get exercise by taking him for a walk every day． Now I feel really healthy．
Choose the best topic from A to F according to the meaning of the passage．
A． Not getting enough sleep has effects on our brain's work． B． Have a healthy diet!． C． Say no to smoking! D． Our survey about doing exercise． E． Taking my pet for a walk makes me healthy． F． Too much pressure is not good for a child's development． |
There are many ways to help improve your health like eating healthy food． taking exercise and getting medical help． But the easiest and cheapest way to improve your health is just to sleep eight hours or more every night． The general sleeping rule is that the younger you are． The longer sleep you need． But regardless of（不管）age， some people need to sleep more while for some a few hours is enough．
The problem with sleep is that more and more people in the world are not sleeping enough．According to the World Health Organization over half the people in the world may be sleep﹣deprived． Having less sleep not only makes people feel tired but also causes accidents． In the United States alone， sleepy drivers cause at least 100，000 traffic accidents a year． Also sleep problems can cause medical problems such as high blood pressure（血压）．
Why are so many people sleep﹣deprived？ Part of the reasons may be cultural． In the American culture， people put a higher value on work than on sleep． In fact， peopele who sleep a lot are usually seen as "lazy"． Also， you can sometimes hear some people say proudly that they don't have much time to sleep． they only sleep four or five hours a night． It seems that the less you sleep， the more work you'll do．
How do we teach these people to learn the value of sleep？ Perhaps they may listen to the advice of Dr． James Maas． an expert（专家） in sleep． He says ，"Sleep is like a credit （信用卡） card． When you sleep less． you are only borrowing time． You always have to pay it back． The more hours you don't sleep， the more hours you should't sleep to "pay back" the hours on your 'sleep credit card．'"
For those who value work more than sleep， they should listen to what a famous person once said． "Don't think you will be doing less work because you sleep during the night． That is a foolish（愚蠢的） idea which is held by people who have no imagination． You will be able to do more．"
（1）According to the writer， the easiest and cheapest way to improve health is to ．
| A． |
eat healthy food every day |
| B． |
take excrcisc as much as possible |
| C． |
get medical help whenever necessary |
| D． |
sleep eight hours or more every night |
（2）What does "slecep﹣deprived" mean in Paragraph 2？
| A． |
Having a good sleep． |
| B． |
Excited about sleep． |
| C． |
Having less sleep． |
| D． |
Interested in sleep． |
（3）According to Dr． James Maas． what is sleep like？
| A． |
An hour． |
| B． |
A report． |
| C． |
A credit card． |
| D． |
A piece of paper． |
（4）What do the words of the famous person mean in Paragragh 5？
| A． |
Sleeping during the night is foolish． |
| B． |
Sleeping during the night is helpful． |
| C． |
People have no courage． |
| D． |
People always do less work． |
（5）What is the best title of the passage'？
| A． |
The Value of Sleep |
| B． |
The Value of Study |
| C． |
The Ways of Eating Less |
| D． |
The Ways of Making Money |
In the year of 2020， the coronavirus（新冠病毒）out broke（爆发）all over the world． A lot of people suffered from（遭受……折磨）a fever or a cough． Don't be afraid． Here is some advice to help you protect yourself．
Wash your hands． You need to wash your hands with soap and water before you eat， after you use the toilet， and after you touch animals， because your hands may carry viruses （病毒）．Cover your nose and mouth． When someone sneezes（打喷嚏）or coughs，the viruses can travel as far as one meter through the air，so you'd better stand a proper distance while talking to someone who has a cold． And always cover your mouth and nose with a piece of paper when you sneeze or cough，and then clean your hands． Wear a mask（口罩）． Some doctors say that masks can stop the virus as much as 80%， but if you don't wash your hands often， it's no use wearing a mask． So it's necessary to wear the mask in the groups of people．
Do sports often． Exercises will help make your body strong enough to resist（抵抗）the virus．
How to protect yourself from the corona virus |
|
Wash your hands． |
● （1） you eat． ● After you use the toilet． ● After you（2） ． |
Cover your nose and mouth． |
● When someone sneezes or coughs， you'd better stand a proper distance while talking to someone． ● Always cover your nose and mouth with a piece of（3） when you sneeze or cough． |
（4） ． |
It's necessary to wear the mask in the groups of people． Masks can stop the virus as much as 80% |
Do sports often． |
Exercises will help make your body（5） enough to resist the virus． |
In the 13th century． Marco Polo the world known Italian travelled， saw many wonderful things in China． One of the things he discovered was money made of paper． People in the West did not have such kind of money until the I5th century． However ，the Chinese began to use it in the 7th century．
Paper was invented by a Chinese man called Cai Lun almost 2，000years ago． But it was not made in Europe until the year 1100． Four hundred years later， a German discovered that he could make the best paper from trees． After that countries rich in forests， such as Canada ，Sweden， America， Finland became the most important ones in paper making．
Paper can be used in many ways． The common uses include newspapers magazines and books． But do you know that paper can be used for keeping warm？ In Finland． the farmers wear paper boots to keep their feet warm in the snow． And even houses can be insulated（使绝缘）from heat or cold with paper．
However． we have to understand that paper still comes from trees now． If we keep on wasting so much paper， there will not be any trees left on the earth some day in the near future． Every day people throw away about 2， 800tons of paper in our city． It takes 17trees to make one ton of paper． This means that we are cutting down nearly 48.000trees every day． The fact is that it takes more than 10years for a tree to grow．
So we must start saving paper right now． We can use both sides of every piece of paper． We can make useful things out of used paper． We can use china cups instead of paper ones． When shopping， we can use fewer paper bags and reuse them if we have some
In short， we should keep a balance （平衡）between using paper and protecting trees， and do it now before it is too late．
（1）When did the Chinese begin to use paper money ？
| A． |
In the 5th century |
| B． |
In the 6th century |
| C． |
In the 7ih century |
| D． |
In the 15th century |
（2）Why did Canada become an important country in paper making ？
| A． |
Because it was a large country |
| B． |
Because it had lots of forests |
| C． |
Because it was a very rich country |
| D． |
Because the inventor was from Canada |
（3）In Finland． paper is used for ．
| A． |
making beds |
| B． |
reducing waste |
| C． |
making umbrellas |
| D． |
keeping warm |
（4）According to the passage． how many trees are needed to make one ton of paper ？
| A． |
10 |
| B． |
17． |
| C． |
2，800 |
| D． |
48，000 |
（5）Paragraph 5 mainly talks about
| A． |
how paper boots are made |
| B． |
how paper was invented |
| C． |
how we can save paper |
| D． |
how we can make useful things |
D
It is reported that some developed countries have shipped broken parts of computers to China．Last month Hong Kong officers found 131，000kilograms of broken computers，TVs and phones sent from Japan．
Things like these are called electronic waste，or e﹣waste．Dealing with them is not an easy job．Every time an old computer breaks down，it needs to be dealt with safely．What is worse，at present，broken computer parts are usually buried ．It may be hundreds of years before they are really gone in the earth．
Many places in China are polluted by e﹣waste．Guiyu in Guangdong Province is one of them．This town is named as"the e﹣waste capital of the world"．It has to deal with 1.5million kilograms of e﹣waste each year，from which it makes 75million yuan．But it comes at a cost．Many of the poisons in e﹣waste find their way into the environment．An environmental group has found the air，the earth and the rivers in Guiyu badly polluted．
Luckily，the Chinese government wants to change the situation．This year，China passed a new environmental protection law．Computer companies like Lenovo and Dell will be asked to take back their old computers．Hopefully，the problem with e﹣waste will be solved in the near future．
71．The e﹣waste found in Hong Kong last month was from ．
A．France B．Japan C．Germany D．Australia
72．The underlined word" buried "probably means in the passage．
A．焚烧 B．降解 C．回收 D．掩埋
73．The town of Guiyu in Guangdong Province ．
| A．is the e﹣capital of the world |
B．has serious e﹣waste pollution |
| C．deals with the e﹣waste safely |
D．spends much money on e﹣waste |
74．This year，the Chinese government ．
| A．closed some computer companies |
B．asked people to hand in old computers |
| C．made a new environmental protection law |
D．tried to change people's life |
75．The passage is mainly about ．
| A．the e﹣waste problem in China |
B．the cost of burning e﹣waste |
| C．the ways to deal with e﹣waste |
D．the need to pass a law against e﹣waste． |
It was dark outside the car window that it was hard to see anything．
"Can I have a carrot，Mum？"Riley asked．
"I don't have any carrots，"her mum said．"If I eat one now，it might help me see in the dark．"
Would eating a carrot really help Riley？What is special about carrots？A clueto what makes a carrot special is its color．Carrots are orange because they store beta﹣carotene（β胡萝素）．Beta﹣carotene is a way to talk about vitamin A （维生素A）．Your eyes need vitamin A．It helps them work．
When light hits your eyes，very small parts inside turn the light into messages．The messages go to your brain（脑），and then you know what you're looking at．Your eyes can only turn light into messages when it has a special chemical（化学物质），that's where vitamin A comes in．Your eyes use vitamin A to make the special chemical．Every time your eyes change light into messages，a little bit of the chemical is used up．By the end of the day，you're looked at hundreds of things．That uses up a lot of the chemical．Your eyes need to make more．
What should you eat if you don't like carrots？Don't worry．Other fruits and vegetables have vitamin A，too．The secret is in their color．Most orange or red fruits store some beta﹣carotene，or vitamin A．Sweet potatoes，red peppers，mangoes（芒果） are a few that have the same orange secret．Can you think of any more？
61．Riley wanted a carrot because she thought ．
| A． |
A she liked it |
| B． |
she was thirsty |
| C． |
it could help her see in the dark |
| D． |
it was sweet and delicious |
62．The underlined word"clue"here in Chinese means" "．
| A． |
告知 |
| B． |
线路 |
| C． |
方法 |
| D． |
线索 |
63．How can Vitamin A help your eyes work？
| A． |
A The special chemical can stop your eyes from using up Vitamin A |
| B． |
Vitamin A can stop your eyes from using up the special chemical． |
| C． |
The special chemical is used to make Vitamin A the light is turned into messages with． |
| D． |
Vitamin A is used to make the special chemical the light is urned into messages with． |
64．Which one is NOT true according to the passage？
| A． |
Carrots are orange because they store beta﹣carotene or vitamin A． |
| B． |
Any food which is orange or red must have some Vitamin A． |
| C． |
Most fruits that are orange or red store some beta﹣carotene or Vitamin A． |
| D． |
Sweet potatoes，red peppers，and mangoes have the same orange secret． |
65．The passage mainly tell us that ．
| A． |
we can't see clearly in the dark unless we eat any carrots every ay |
| B． |
we can't see clearly unless we eat any orange or red food everyday |
| C． |
we should eat some food with Vitamin A so that we can see clearly |
| D． |
we should eat some fruit with beta﹣carotene so that we can see in the dark． |
We all waste food，you and me，every day，millions of tons of it．In China，enough food is wasted in restaurants every year to feed 200 million people．And the amount of food wasted by Chinese consumers is increasing fast．So our nation is being encouraged to stop wasting food．
So what should Chinese consumers do to prevent food waste？
♦Keep a kitchen diary
All of us should keep a kitchen diary，and we can know that how much food we waste at home．The first thing for us to do is to stop throwing away food that we can still eat．We should eat everything we buy and if we cannot，we should buy less．
♦Buy only what we need
We should ask for smaller portions in stores．We should also check how much food we have before buying more．We shouldn't bring much food we don't need home even if large posters ask us to do so．
♦Develop the habit of packing food．Chinese consumers are generous and friendly．In restaurants，often too much food is ordered and served．So when ordering out，we are supposed to exclude the food in the order if we don't plan to eat it．And order smaller servings in restaurants and take home what we cannot finish．
Don't put it off! Let's stop food waste today!
（1）Why is our nation being encouraged to stop wasting food？
A．Because there's enough food for Chinese people．
B．Because Chinese consumers like to try delicious food．
C．Because the number of food wasted by us is growing fast．
D．Because it's traditional to invite friends to dinner in China．
（2）Miss Li is a housewife，she'd better at home．
A．keep a kitchen diary
B．buy things as much as possible
C．cook too much food for her family
D．keep the food as long as possible
（3）In order to urge（力劝）more and more people to prevent food waste，we design a poster with the words ．
A．Enjoy the food!
B．Keep healthy!
C．Share the dish!
D．Waste not，want not!
（4）Your friend invites you to dinner，which of the following is NOT right？
A．He asks for the right portions．
B．You leave a lot of food on the table．
C．You ask your friend to order less food．
D．He takes away the food that you can still eat．
（5）As teenagers，what should we do to stop food waste？
A．Have a balanced diet．
B．Eat less food to keep fit．
C．Keep the balance of nature．
D．Have a good habit of clearing the plate．
Having a pen pal is fun and can be a great way to improve your writing skills．But most people have trouble knowing what to write to their pen pals．（1）
（2） Break the ice by telling your pen pal a little about yourself．Start with your name，age and job．Write about what you like to do or what's on your mind that day．What you pass on will encourage your pen pal to tell you something about his．（3）
Ask questions（4） This will help you get to know him and probably get you a faster answer．Make your questions into the e﹣mail by telling him something you like to do and then asking if he's ever tried it．
Ask for advice．You may have some difficulties in your life and want to ask for advice．Your pen pal may tell you what to do．（5） Also，discussing real﹣world questions will promote（增进） your friendship．
A．Share you information． B．What do you think of having a pen pal？ C．And this will be helpful to start your friendship． D．Luckily，here are some ways to get to know a pen pal． E．Write questions for your pen pal to answer in his next e﹣mail． F．You don't have to take all his advice，but it will give your something about his opinions． |
In 1988，Wang Chengbang retired（退休）from the army.Instead of enjoying a relaxing life，he volunteered to save the soil from desertification（沙漠化）by planting trees in Korla，Xinjiang.
It is no easy job.The high temperature in Korla makes it difficult for anyone to work day after day in the sunshine.Besides，water is a big problem.In fact，Wang Chengbang's work in the first few years failed as very few trees survived（存活）.
But Wang Chengbang would not give up."After trying many different ways，I have learned how to grow young trees in a better way，" said Wang Chengbang.He also worked out new ways to save water.With his hard work，more and more trees have survived.So far，he has planted more than 1.5 million trees.Those green trees prevent desertification，make the air cleaner and protect people from the hot sun.Now，Korla is a model city in environmental protection.
Wang Chengbang is also successful in fighting cancer（癌症）.In 2005，he had cancer and was told that he had only six months to live.However，he continued taking care of his trees rather than lying on the hospital bed."Working is the best medicine.Planting trees helps to fight cancer，" he often jokes.
Now，at the age of 85，Wang Chengbang is still working.
（1）Is it an easy job for Wang Chengbang to plant trees？
（2）How many trees has Wang Chengbang planted so far？
（3）What is Wang Chengbang successful in？
（4）In the summer holiday，do you want to be a volunteer to work with Wang Chengbang？Why or why not？
Believe it or not，oceans and seas are easy to be harmed by the development of human society．There are also influenced by man﹣made pollution easily．It is human beings that do great harm to the ocean ecosystem．
The coral reefs （珊瑚） of fine ecosystems that provide food and protection for many ocean creatures（生物）．The quarrel in almost all the oceans is in danger for pollution．Chemicals from factories end up in the seas and oceans and destroy（破坏） coral reefs．If the coral system die，some ocean creatures will be sure to die out．
Protecting the ocean also has something to do with the protection of ocean wildlife like dolphins．The fishing industry depends on modern ways to catch many fish in order to earn more money．But net for fishing also catch other sea animals．The fishing boat workers are advised to check their nets and set other ocean animals free．But the boats are in a hurry to make money and often other ocean animals are caught with fish．
Oil spills can destroy the ocean environment because of oil kills all ocean life．The world depends on oil and because there is plenty of oil off the shore in many countries．The need for you is more important than the risk of the oil spill．However，the fact is that one ocean mistake can lead to an ocean environment accident that will cause years of damage to the financial ecosystems．Or use bills will kill all the creatures in the area of the spill．The oil will be washed up on the shore and destroy ecosystems along the shore，including birds．
Everyone who cares about the environment should pay more attention to protecting the ocean，and all of us should do something for the protection of the ocean．
61．According to the passage，the ocean is harmed easily as a result of ．
A．the overuse of the oceans
B．the change of natural conditions
C．the growth of population by the sea
D．the activities of humans
62．What does the second paragraph mainly tell readers？
A．the importance of protecting coral systems．
B．Coral reefs are home to ocean animals．
C．The great harm caused by factory pollution．
D．How ocean creatures depend on coral reefs．
63．Why do people continue to get oil in the sea at the risk of oil spills？
A．Because they believed all you still can be stopped．
B．Because there is plenty of oil in the sea．
C．Because they are in great need of oil
D．Because getting oil in sea is easier than on land．
64．What does the underline word "damage" mean？
A．混乱
B．损害
C．灾难
D．误导
65．This passage is written mainly to tell us ．
A．many ocean creatures are in danger now
B．oceans can provide us with a great deal of oil
C．the sea has been seriously polluted
D．something should be done to protect the oceans．
What do you do with your rubbish？Throw it out？You don't know what you're missing!Look closely at the two figures on your left.They were made from things most people throw away.The figures were made from used bottle caps.Those two bottle﹣cap figures were exhibited （展示） in a museum.
Folk art is art made by common people who have not been trained as artists.Their work is often based on traditions in their culture.Fine art，on the other hand，is usually made by people who have had training in art.Works of fine art are valued for their artistic beauty.They are supposed to be looked at but not used.Works of folk art，however，are often made for everyday use.
There were more than 800 pieces of folk art from nearly 50 countries in the exhibition.All of the pieces were made from used metal，wood，cloth，and plastic.The artists come from many different cultures.Still，they all share one thing.They take objects that are normally thrown away and change them into objects that are beautiful，useful，and fun.The artists may not think of what they do as recycling，but that's exactly what it is.Fine artists might work with expensive materials.They might use expensive tools to shape these materials into works of art.On the other hand，in poor countries rubbish might be the only material folk artists and toy makers can afford.The exhibition shows that a rich imagination is very important when there are only poor materials.Recycled art began long before people began to think about recycling.Some of the objects in the exhibition date from the 1930s.
Even if you don't create art out of rubbish，it's good to save our natural resources.Remember the three rules：reduce，reuse，recycle.If you reduce waste，true things instead of throwing them out，and recycle materials such as paper，plastic，and glass，you will protect the environment.
（1）Which idea belongs in the empty box？
Conclusion （结论） |
Details |
Art based on cultural traditions |
|
Art made for everyday use |
|
Art made with used materials |
A.Folk art is made by people who are not trained artists.
B.The artists come from many different cultures.
C.Recycled art began long before people started recycling.
（2）What can we learn from Paragraph 3？
A.There was more than 800 pieces of fine art.
B.Folk artists can't shape expensive materials into works of art.
C.Poor materials also can be made into works of art.
（3）What is the same thing of the pieces in the exhibition share？
A.They are all woks of fine art.
B.They are all made from used materials.
C.They are all made by the trained artists.
（4）What can we do to protect our environment？
A.Throw away used materials.
B.Only use expensive materials.
C.Recycle materials.
（5）Which of the following would be the best title for the passage？
A.Used Bottle Caps
B.The Art of Recycling
C.A Museum Exhibition
Air pollution is a big problem for cities in most countries． Many people are dying from it． But how can we tell the air quality is good or bad？
On a tree next to a river in Amsterdam， a tiny birdhouse glows （发光） bright green when the air is clean． If you're standing nearby， the birdhouse will also give you a free Wi﹣Fi connection﹣but only if pollution level is low enough． The designer is Joris Lam． His birdhouse tells you about the air quality．
Joris' birdhouse is called TreeWifi． It can be put on a tree around your house to test the air quality． People can see a screen with information about the local air quality and how to improve it． TreeWifi is a simple way for people to know about the air pollution around them． If the birdhouse does not glow， people should care more about the environment． It reminds them to change their lifestyles． For example， to protect the air， they can ride bikes or just walk instead of driving cars．
"Imagine if trees gave free Wi﹣Fi， people would plant more trees like crazy． It's a pity that they only give us the oxygen（氧气） we breathe，" Joris said．
The birdhouse doesn't work as a home for birds now． Joris and his team are trying to make some changes to it． In the future， they hope birds will live in the birdhouse and the heat of its green light will be used to keep birds warm in winter．
（1）What does the underlined word "it" in Paragraph 1 refer to？
A． The birdhouse．
B． Air quality．
C． Air pollution．
（2）People can get a free Wi﹣Fi connection when ．
①people are standing nearby
②the pollution level is low enough
③the air quality is low enough
A．①②
B．②③
C．①③
（3）Joris designed a screen for the birdhouse to ．
A．receive the free Wi﹣Fi connection
B．protect the birdhouse from the rain
C．show information about the air quality
（4）In the future， the birdhouse will also be used ．
A． as a home for birds
B． to tell us the weather
C． to give us the oxygen
C
Have you ever been to Yellowstone National Park，a national park primarily in the US state of Wyoming（怀俄明州）？At Yellowstone National Park，①．When they are heated for more than a few minutes，they will break up．
In Atlanta，the USA，there is a popular restaurant which is very special．In the restaurant，waiters no longer throw uneaten food into litter cans．Instead，②．
In America，a new activity known as "zero waste" is becoming popular．It is carried out in schools，cafes，gyms，parks，restaurants and other places．"Zero waste" activity calls on people to produce less litter．It encourages people to reuse whatever they can．
Although the idea seems a little unrealistic （不现实的），it is necessary．According to a new report，American people produce the largest amount of the litter in the world．Each person produces almost 4.6pounds of litter every day．More than half of the litter which is put into landfills is harmful．Actually，this is bad for the environment．Besides this，more landfills（填埋场） are needed．
"Nobody wants to have a landfill lying near his house，"said Jon D．Johnson from the Environmental Protection Agency，which helps to carry out "zero waste" activity．"There are not enough landfills，so we can't put all our litter into them．We should try to recycle it as much as we can．"
61．从A、B、C中为①②处选出恰当的选项，使文章通顺、连贯、合理．
A．the plates used for food are made of a special kind of plastic
B．there are several restaurants
C．the food is used to make compost（混合肥料）
① ②
62．在文章中找出能替换划线词语"位于"的英文单词． ．
63．What's the purpose of "zero waste" activity in paragraph 3？
64．请将文中划线部分"More than half of the litter which is put into landfills is harmful．"译成汉语．
65．What's the main idea of this passage？
．
In the modern age，human society runs on energy．Most machines need electricity to operate．Humans can not live without electricity even a single day both in their daily life and work．They have many different ways to create electricity．But some ways are harmful to the environment．
For example，fossil fuels（化石燃料）are the most common kind of energy．They include coal，oil，and natural gas．First，people have to dig them from the ground．This can sometimes harm the environment．However，scientists are creating cleaner and better ways to do that these days．So the environment is not harmed as much as before．But when people burn these fossil fuels，they can give off a lot of harmful gases，which is considered to be one of the greatest causes of global warming．This might harm the environment．
Tidal（潮汐）energy is another way to make electricity．This uses the ocean tides to make electricity．But some kinds of tidal energy can kill many fish and other sea animals．Also dams（大坝）can create lots of clean energy．But dams create lakes and change the way that rivers run．So they can do great harm to the balance of nature around the lakes and along the rivers．
34．According to the passage，which of the following is TRUE about fossil fuels？___
A．They are dug from the ground．
B．They are considered expensive．
C．They hardly harm the environment．
D．They are not widely used in the world．
35．From the passage，we know that tidal energy can ．
A．cause serious accidents
B．change the way that rivers run
C．give off a lot of harmful gases
D．kill many living things in the ocean
36．Nowadays many countries start to use nuclear energy more because ．
A．it's a common kind of energy
B．people ara not afraid of it now
C．it's cheap，clean and safer than before
D．people can't live without nuclear energy
37．The passage is probably in the part of in a newspaper．
A．health
B．science
C．culture
D．sports．
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