We have been used to wearing masks（口罩） in public since February．About 300 million masks are used and then thrown away every day in China． Where do these masks go？ You might think they just go in a rubbish bin． But that's just the first stop on the masks' journey．
After the masks are thrown into the bins，rubbish trucks empty the bins and take the rubbish to landfills（垃圾场） Next， the masks will be taken to rubbish incinerators（焚化炉） and burned．
Burning masks might not seem to be very good for the environment． Won't it cause pollution？
The answer is "no"， according to China Daily． The main material of most masks is polypropylene（聚丙烯）． It's non﹣toxic（无毒的） After burning， it changes into water and CO2．In fact， burning the masks can bring some benefits（益处）． The process of burning the rubbish can produce electricity． Burning one ton of rubbish can produce more than 400 kilowatt hours（度） of electricity． Some people make a prediction that there will be 162，000 tons of used masks in
China this year． Burning all of them can produce more than 64 million kilowatt hours of electricity．
This is enough to make an electric car drive about 370 million km， which is 9，250 times as long as the earth's equator．
At last， the slag（残渣） from burning masks can be recycled to make bricks（砖块） or fill the roads．
（1）How many masks are used and then thrown away every day in China？
A． More than 64 million．
B． About 300 million．
C． About 370 million．
D． About 9，250 million．
（2）The first stop on the masks' journey is ．
A． electricity factories
B． landfills
C． rubbish trucks
D． rubbish bins
（3）The main material of most masks is ．
A． plastic．
B． polypropylene
C． water
D．CO2
（4）Which of the following is TRUE according to the passage？
A． Burning masks won't cause pollution．
B． People are not used to wearing masks in public．
C． There are 162，000 tons of used masks every month in China．
D． The process of burning the masks can produce electricity and bricks．
（5）What is the best title of the passage？
A． How do We Bum Used Masks？
B． How do People Produce Electricity？
C． Where do the Used Masks Go？
D． Why do We Throw Away Used Masks？
When he was nine years old，an American bey called Milo Cress had a question：How many plastic straws（吸管）do Americans use every day？
He quickly learned there wasn't a simple answer．The boy tried to find it out himself．Through lots of research，Cress found out that Americans use about 500 million straws every day．In hopes of cutting down plastic waste，he founded the Be Straw Free project in 2011．
Cress started the project in his hometown Burlington． Vermont． He asked a local restaurant to stop offering straws with every drink order． It was a simple change． However， it would save money．And by doing that， the restaurant would cut down on its straw use by 50 percent．
For the year that followed， Cress tried to spread his proicct across the United States． More and more restaurants agreed to join． They stop providing the customer with a straw unless he or she asks for one． Last April， Seattle became the first American city to completely ban plastic straws．
After his project became popular， Cress took his findings on the road． He has spoken to tens of thousands of students around the world． He wants to encourage more people to say no to plastic straws．
"Focusing on straws is one simple step we all could take，"Cress says．"And it makes me feel that I， as a kid， could make a difference， too．"
（1）Cress found out that Americans use straws every day．
A． about 50 million
B． about 500 million
C． about 10 million
（2）Cress founded the Be Straw Free project in order to ．
A． save money
B． become popular
C． cut down plastic waste
（3）Which American city first completely banned plastic straws？
A． Burlington．
B． New York．
C． Seattle．
（4）What does the sentence "Cress took his findings on the road"mean？
A． Cress took a walk on the road．
B．Cress spread his project around the world．
C． Cress was doing his research all the time．
（5）According to the last paragraph， Cress thinks ．
A．he could be famous
B．he has made much money through his project
C． he could also do something meaningful although he is a child
Once there were many thousands of Gourma Desert （沙漠） elephants in Mali， a country in West Africa． Now． there are fewer than four hundred．
Why did the number of the elephants drop so quickly？ On the one hand， the elephants' main lake． their only water source （来源） dried up． On the other hand，the land which the elephants lived on was overused by humans．
To protect the elephants' living environment， the Mali Elephant Project （MEP） was started in 07． MEP met with local people and helped them make rules of using land and water． As a result， the situation became better and there was more food， forest and grassland．
However． from 2012 to 2016， poaching （偷猎） and illegaltrade in the elephants increased rapidly Eighty﹣three elephants were lost in 2015 alone， and another fifty﹣one elephants were killed in 2016．"If this situation goes on， all the Gourma elephants will be killed by 2020．" said a member of MEP．
Luckily． the voice of MEP was heard． More organizations （组织） have joined together to educate the local people that trading elephants is against the law．Elephant poaching has dropped to a very low level． The local people have learned to live peacefully with the elephants，one of the wildlife treasures in the world．
（1）MEP was started to ．
| A． |
raise more elephants in Mali |
| B． |
stop the main lake from drying up |
| C． |
discover water source for elephants |
| D． |
protect the elephants' living environment |
（2）What does the word " illegal" in Paragraph 4 mean in Chinese？
| A． |
公平的 |
| B． |
亏损的 |
| C． |
非法的 |
| D． |
合理的 |
（3）Eighty﹣three elephants were lost ．
| A． |
in 2012 |
| B． |
in2015 |
| C． |
in 2016． |
| D． |
in 2020 |
（4）We can learn from the last paragraph that ．
| A． |
the number of organizations has dropped |
| B． |
there is much less elephant poaching now |
| C． |
the local people keep the elephants at home |
| D． |
the whole world live peacefully with elephants |
（5）This passage is mainly about ．
| A． |
the rules of using land and water |
| B． |
the education of the local people |
| C． |
the work of Mali Elephant Project |
| D． |
the situation of Gourma Desert elephants |
Many animals are in danger around the world．Here are some examples．
|
The blue whale lives in oceans around the world．It is the largest animal in the world，but it eats the smallest animals for food．Many people kill the whales．And not enough clean water is also a problem．There may be only 1，300 blue whales left． |
|
The wild Bactrian camel lives in Northwest China and Mongolia．It is a large camel and the only species （种类） in the world with two humps （骆驼）．There are perhaps 950 left in the wild． |
|
Many Asian elephants live in India but you can find them in other countries as well．There are many elephants which work for people．There might be 35，000 Asian elephants left in the wild． |
43．Is the largest animal in the world．
A．The blue whale
B．The wild Bactrian camel
C．The Asian elephant
44．Where does the wild Bactrian camel live？
A．In oceans around the world．
B．In Northwest China and Mongolia．
C．In India and some other countries．
45．How many Asian elephants are there perhaps left in the wild？
A.950
B.1，300
C.35，000．
| A． |
The World Health Organization（世界卫生组织） says air pollution kills seven million people around the world each year． Even if polluted air does not kill us， it can make us very sick． |
| B． |
However， breathing dirty air may do more than hurt your body． It can also affect（影响） your brain and your ability to think． |
| C． |
A new study shows that air pollution can cause a"huge"reduction（减少）in our intelligence（智商）．The researchers reported that long﹣term exposure（暴露） to air pollution can affect a person's mental（智力的） abilities in two areas： language and math． |
| D． |
Xi Chen， the researcher of the Yale School of Public Health led the study． He and his team found that breathing polluted air can reduce a person's education level by about one year． |
| E． |
Chen said that the effect（结果） generally is worse for those over 64 years of age，for men and for those with little or no education． |
| F． |
"The older persons﹣ they are more affected． And we find， quite interestingly，men are more affected than women． And people working outdoors are more affected than people working indoors． |
| G． |
The researchers noted that the effect of pollution on language ability is even more serious as people age， especially among men and the less educated． |
| H． |
Why were language skills more affected than math？ There are two main kinds of tissue（组织）in the brain： white matter and grey matter． White matter is more connected with a person's language skills， while grey matter is connected to our ability to solve math problems． Studies have shown that air pollution has a great effect on the white matter in the brain， but not the grey matter． |
Chen said that air pollution did affect the math skills， just not as much as their language skills．
（1）Air pollution causes million people to die around the world each year．
| A． |
one |
| B． |
two |
| C． |
seven |
| D． |
sixty﹣four |
（2）Which is not true according to the passage？
| A． |
Breathing dirty air may hurt your body |
| B． |
Breathing dirty air can affect your brain |
| C． |
Breathing dirty air can affect your ability to think |
| D． |
Breathing dirty air can make your immune system（免疫系统） strong |
（3）The effect of breathing polluted air generally is worse for those people except ．
| A． |
men |
| B． |
women |
| C． |
those with little or no education |
| D． |
those over 64 years of age |
（4）In the sixth paragraph， "people working outdoors"probably refers to（ 指的是）" "
| A． |
the researchers |
| B． |
people with little or no education |
| C． |
people from the World Health Organization |
| D． |
people from the Yale School of Public Health |
（5）Air pollution affected the language skills math skills．
| A． |
as much as |
| B． |
as little as |
| C． |
more than |
| D． |
less than |
You don' t have to be a scientist to solve big environmental problems． One Dutch designer is finding creative ways to make a change﹣and he's inviting bikers to join him．
Daan Roosgaarde， 38， is a designer from Holland． He uses creative ideas to improve city life． For his Smog （雾霾） Free Project， he designed a special tower that cleans air in Chinese parks． In Holland， he designed a shining bicycle path．
Now Daan and his team are working with engineers at Chinese bike﹣sharing company Ofo to create a new product for public use． It's an air﹣cleaning machine connected to a bicycle and is part of the Smog Free Project． In smoggy weather， the machine would breathe in the air in front of the bike and blow out a stream of clean air toward the biker's face．
It's no secret that air pollution is a big problem for China． In winter， it's common for thick clouds of haze （霾）， caused largely by factory production， burning of coal and car emissions （排放物）， to cover areas of China．
In 2016， only one﹣fourth of Chinese cities met the country's air quality standards， according to a survey of 338 cities nationwide from the Ministry of Environmental Protection．
"Of course one tower and a few bikes won't solve China's air pollution problem，" Daan said， "But smog﹣free bikes are an exciting idea that will hopefully inspire communities to create greener cities．"
（1）According to the writer， ．
A． air pollution is not a big problem in China
B． creative ideas may help improve city life
C． only scientists can solve big environmental problems
D． the survey of 338 cities nationwide was not necessary
（2）The air﹣cleaning machine offers clean air to the hiker by ．
A． blowing out dirty air
B． running fast with the bike
C． cleaning the air around the biker
D． breathing in dirty air and cleaning it
（3）From the passage， we know that ．
A． people who have creative ideas can get free bikes
B． only smog﹣free bikes can go on the shining bicycle path
C． Daan and his family spent all their time improving China's air quality
D． China's haze in winter happens because of more than three causes
（4）Daan is inviting bikers to join him in order to ．
A． raise money for the tower
B． test his new machine
C． help solve the air pollution problem
D． make more Chinese friends
（5）What is the best title for the passage'？
A． Breathing In and Out
B． Biking for Fresh Air
C． Survey from the Government，
D． China's Air Pollution Problem
Sometimes you get so angry that you feel like you are going to burst! It may seem like your anger （生气，发怒） will be the boss of you． What can you do to control your anger and how to keep yourself and others healthier and safer？ Here are some ideas to help you．
• Take a deep breath before your heart slows down again．
• Count from I to 10slowly in your mind before you open your mouth． Then count another 10． Think about what to do or say before making a choice．
• Walk away from the place that makes you angry． Go somewhere else until you've thought about what you can do．
• Use your words to tell your feelings． Don't hurt anyone with your hands or feet．
• Say what you feel in a low voice， not in a loud voice．
Sometimes you need to do something to let those angry feelings out． For example， doing a chore that you hate is a very good idea． It can get rid of （消除） your anger and you can feel better when that chore has been done． In this way， you will make anger become something useful．
根据短文内容，选择最佳选项，将其标号在答题卡上涂黑．
（1）What's the Chinese meaning of the underlined word "burst" in this passage？
| A． |
绽放 |
| B． |
爆炸 |
| C． |
分隔 |
| D． |
闯入 |
（2）What will happen if you are the boss of your anger？
| A． |
You can burst． |
| B． |
You can shout loudly． |
| C． |
You can keep calm． |
| D． |
You can be dangerous． |
（3）How many numbers should you count to control yourself before making a choice？
| A． |
10 |
| B． |
20 |
| C． |
30 |
| D． |
40 |
（4）What's the best title of this passage？
| A． |
How to control your anger？ |
| B． |
Don't hurt anyone with your hands． |
| C． |
Do some chores that you hate． |
| D． |
How to make a good choice？ |
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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