The Earth is about 4,600 million years old. People live on the Earth for only 35,000 years. But we change the Earth in many ways. Many things we do are good, but some are not good for the Earth.
Water pollution
A lot of people, birds and fish die each day because of water pollution. Factories pollute the water. As a result, the water in many rivers and lakes is very dirty now.
Air pollution
In big cities, factories, cars and buses are the main causes (原因) of air pollution. Many people in cities now have health problems. For example, Mexico used to be a beautiful city and was a good place for people to live, but today there is lots of PM2.5 in the air. And many people get ill because of the polluted air.
Soil (土壤) pollution
In order to have a better harvest (收获), some farmers use chemicals (化学物质) in their fields. That’s bad for the soil.
Hope for the future
These problems are very bad for our future, so all of us should do something to protect the environment. If we can stop pollution, the Earth will become more and more beautiful.
1. How old is the Earth?| A．About 3,500 million years old. | B．About 3,700 million years old. |
| C．About 4,600 million years old. | D．About 4,800 million years old. |
| A．Plants. | B．Cloud. | C．Animals. | D．People. |
| A．Two. | B．Three. | C．Four. | D．Five. |
| A．The water in many rivers is very clean now. |
| B．Mexico was a good place to live in the past. |
| C．Factories, cars and buses can cause air pollution. |
| D．Now more and more farmers use chemicals in the fields. |
| A．To ask us to learn about the Earth. | B．To ask us to thank the Earth. |
| C．To ask us to enjoy the Earth. | D．To ask us to protect the Earth. |
相似题推荐
Are you wondering where to go for exploring in Antarctica (南极洲)? Check this science magazine out. | |
 Weather | Antarctica lies in the most southern part of the world. It is the coldest area on Earth. There isn’t much rain, but there is a lot of snow and wind. The lowest temperature was on 21 July in 1983 at -89.2℃! |
 Population | Nobody lives in Antarctica all the time! The first people to stay there for a while were fishermen in 1786. Now there are about 5,000 scientists and researchers there in summer. |
 History of exploration | During 1907—1909, British explorer Earnest Shackleton explored Antarctica on foot. In 1911, two explorers—a British man named Scott and a Norwegian named Amundsen—raced 1,400 kilometers to the South Pole (南极). Amundsen arrived first. |
 Animals and birds | There aren’t any large animals in Antarctica. Polar bears live at the North Pole. But there are a lot of penguins and seabirds. Every spring there are over 100 million seabirds in Antarctica. |
| A．In 1786. | B．In 1907. | C．In 1911. | D．In 1983. |
| A．Scientists. | B．Fishermen. | C．Researchers. | D．Explorers. |
| A．Britain. | B．Norway. | C．The South Pole. | D．The North Pole. |
| A．Polar bears. | B．Benguins. | C．Penguins and seabirds. | D．Seabirds. |
| A．A storybook. | B．A tour website. | C．A cookbook. | D．A science magazine. |
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| This is Sophie’s cat. Her name is Mozzi. She is five years old. She is black and white. She lives in Sophie’s house with her dog. | This is a Monarch butterfly. It is very beautiful. It lives in Canada, the United States and Mexico. It lives for about nine months. It eats Leaves. In the winter it goes from Canada, to Mexico. | This is a hippopotamus. The hippopotamus is a very strange animal. It is very fat and heavy. It has very thick skin. It lives in Africa and it eats grass. |
| A．In Canada. | B．In the USA. | C．In Mexico. | D．A, B and C. |
| A．It is fat. | B．It is heavy. | C．It has thin skin. | D．It eats grass. |
| A．Mozzi lives with another cat | B．we can find hippopotamuses in Africa |
| C．they are all home animals | D．a monarch butterfly lives for a year |
【推荐3】Are you sometimes a little tired and sleepy in the early afternoon? Many people feel this way after lunch. I have a habit of taking a nap (小睡) after lunch. Without a nap at noon, I will feel uncomfortable the whole afternoon.
At noon—about six to eight hours after you wake up—your body temperature goes down.
In many parts of the world, people take naps in the middle of the day, especially in hot weather, where the heat makes work difficult in the early afternoon.
Many working people have no time to take naps though doctors may advise taking naps in the early afternoon. Here are a few tips about your nap:
Remember that the best time to take a nap is about eight hours after you get up. A short sleep too late in the day may only make you feel more tired and sleepy later.
| A．This is why you feel sleepy. |
| B．A nap after lunch can make me feel fresh and comfortable. |
| C．This can also happen if you sleep for too long. |
| D．Generally speaking, old people need less sleeping than the young. |
| E．In fact, naps are good for everyone in any weather. |
【推荐1】Taking a bus or subway, making payments online,or just walking-these daily activities can help turn China's deserts（荒漠） into forests if you are using Ant Forest．
Ant Forest is a feature(功能)in the Alipay mobile payment app. It records users' low-carbon（低碳的）activities -taking a bus to work instead of driving, for example - and gives users "green energy". When the user's green energy gets high enough, Ant Forest and its partners will plant a real tree for the user．
Ant Forest recently received the 2019 Champions of the Earth award ("地球卫士奖"), the UN's highest environmental honor (荣誉), for encouraging people to live greener lifestyles and protect the environment．
About half a billion people have used Ant Forest since it came out in August 2016. Ant Forest and its partners have planted about 122 million trees in China's driest areas，including parts of Inner Mongolia, Gansu, Qinghai and Shanxi．The trees cover a total area of 112，000 hectares（公顷）．This makes Ant Forest China's largest tree-planting project started by a private（私营的）company．
Executive director of the United Nations Environment Program Inger Andersen said that Ant Forest shows us how we can use technology to solve environmental problems．Ant Forest has "fundamentally（从根本上）redesigning how we interact (相互影响）our planet.” said Anderson．
1. You can get "green energy" in Ant Forest by___．
a.taking a bus b.paying bills c.walking d.planting trees e.opening the app
| A．abc | B．bde | C．acd | D．bce |
| A．it helps people save money |
| B．it is the first company to plant trees. |
| C．it solved a serious environmental problem |
| D．it encourages people to protect the environment |
| A．Alibaba has already planted millions of trees． |
| B．Alibaba only plants trees in poor areas． |
| C．The trees planted by Alibaba have fully covered China's deserts． |
| D．More than half of China’s popuiation is using Ant Forest． |
【推荐2】A 12-year-old middle school student from Chongqing spent her last summer vacation protecting wild animals at a conservation area (保护区) in Masai Mara, Kenya.
Her unusual experience shocked her teachers and classmates when she shared this at a recent charity (慈善) event in the school.
Zhou Yang’s father is the first full-time worker from China to carry out protection work of wild animals in Africa.
As her father often told her stories about wild animals in her childhood, the girl developed an interest in all kinds of animals. Her father took her to travel around Africa for the first time when she was 4 years old.
She visited Africa for the second time at the age of 8. After coming back to school, she came up with the idea of protecting wild animals among her classmates and other students.
During the last summer holiday, the girl traveled to Africa again. “I am not a traveler this time. I spent nearly two months putting my heart into the research and protection of wild animals there.”
“Every day the birdsong wakes me up. Then I follow my father to patrol (巡查) the area to check if some animals are injured. If everything is as it should be, we start enjoying our breakfast,” the girl wrote in her diary.
“In the afternoon, my father and I work at our home in the field. In the evening, we begin patrolling again until 7 p.m. Then we play games beside the campfire. With the animals’ low roars (吼叫) in the background, we fall asleep,” says another part of her diary.
1. Zhou Yang traveled to ________ last summer.| A．Cuba | B．Canada | C．Libya | D．Kenya |
| A．four | B．seven | C．eight | D．twelve |
| A．her teachers | B．her classmates | C．her father | D．her mother |
| A．a young girl’s study in a foreign country | B．a young girl’s experience of protecting the wild animals |
| C．a young girl’s traveling to a foreign country | D．a young girl’s experience of helping others |
| A．Zhou Yang woke the birds up every morning. | B．Zhou Yang was afraid of the animals’ low roars. |
| C．Zhou Yang had breakfast with some injured animals. | D．Zhou Yang’s story greatly surprised her teachers and classmates. |
【推荐3】In Australia there is a famous island called Fraser Island. A great many visitors come here for holidays every year. Why? The reason is that it is special.
Though the island is a popular place of interest there is no airport on the island. The long beach along the east coast works as the airport.
On the island there are sand hills without any plants, but there are forests with old trees, beautiful flowers and over a hundred lakes, too. Many kinds of birds and animals live in the forest.
Every year, visitors come to enjoy the island’s natural beauty. People like camping and hiking there.
阅读短文,根据上下文,选出四个适当的选项,分别填入文中空白处,使短文内容完整正确,选项中有一项多余。（共4小题）
| A．Planes arrive and leave from here. |
| B．Anyone who breaks the rules will be punished. |
| C．The island is completely made of sand. |
| D．Unluckily, visitors have caused many problems. |
| E．So it is time to protect the environment of the island. |
【推荐1】As we all know, environmental pollution is still serious nowadays. Our group wanted to know how many students knew about each kind of the pollution and we wanted to learn how often they sorted (分类) rubbish. So we did a survey among the students in our school. Here are the results of our questionnaire (问卷).
The results of the questionnaire
Do you know about these problems?
How often do you sort rubbish? |
| A．Scientific research. | B．Environmental protection. |
| C．Everyday habits. | D．Physical education. |
| A．Air pollution. | B．Water pollution. |
| C．Noise pollution. | D．Global warming. |
| A．All of the students. | B．Most of the students. |
| C．Some of the students. | D．None of the students. |
| A．Air pollution is noticed by a large number of students. |
| B．The students don’t realize the situation of the environment at all. |
| C．Five kinds of environmental pollution are mentioned in the questionnaire. |
| D．Most students take enough action to sort rubbish. |
April 22nd is World Earth Day. It’s a day that tells us to care about our planet.
The Earth faces a lot of problems. Global (全球的) warming is the biggest problem in the world. It makes the Earth hot and changes the global weather.
It also makes the sea level (海平面) rise. If the sea level keeps rising, some places such as the Maldives, St. Petersburg in Russia and Bangkok in Thailand may disappear under water in just a few years.
Another big problem is water pollution. We can only use 3% of the Earth’s water. But people throw rubbish and pour dirty water into rivers and the sea. Almost 884 million people don’t have clean water to drink.
Besides, humans are using up natural resources (资源). Forests are becoming smaller and smaller because people cut them down for building. There will be no coal to use on the Earth by 2158 and oil will dry up by 2050.
It’s everyone’s duty to save the Earth.
1. When do Chinese people have World Earth Day?| A．In spring. | B．In summer. | C．In autumn. | D．In winter. |
| A．Water pollution. | B．Air pollution. | C．Global warming. | D．Cutting down trees. |
| A．The sea level will go up. | B．The weather will become cold. |
| C．Some countries will go down. | D．People will have no clean water. |
| A．When the Earth will lose coal and oil. | B．What we can do to protect the Earth. |
| C．How we can control global warming. | D．Why the Earth has so many problems. |
【推荐3】One day, after getting back home, Ann began to practice the dance to music, but her mother wouldn’t let her play music loudly at home, so she had to take her radio outside. Then she went to find her best friend, a rabbit called Qiqi.
When she found Qiqi, he was sleeping. She asked him to join her as she cleaned the environment. But Qiqi said unhappily, “Your music is too loud, and it has woken me up.”
However, Ann continued, “Come on! Let’s clean the environment.” “All right, but you should find the bear first.”
Ann then looked for the bear. When she found the bear, the bear was surrounded by smoke. “What’s the matter?” Ann asked. “Oh, nothing serious. I’m just smoking a cigarette,” said the bear.
After a while, the smoke becomes very thick. Ann and the bear could no longer breathe. “Put out your cigarette,” said Qiqi, who quickly joined them. “You two are making mistakes. Ann is making noise pollution, and the bear is making air pollution.”
After hearing this, Ann turned down her radio, and the bear threw away his cigarette.
根据材料内容选择最佳答案。
1. At first, Ann danced ________.
| A．in her school | B．in the garden | C．at home | D．at the gym |
| A．Because Ann’s music was too loud. | B．Because Ann fell ill. |
| C．Because she has no food to cal. | D．Because Ann is too strict with her. |
| A．they did not want to breathe | B．Ann’s radio was too loud |
| C．the bear was making too much smoke | D．Qiqi didn’t tell them to put out the cigarette |
| A．loud music and smoke are both bad for the environment |
| B．Ann was wrong to find him and clean the environment |
| C．the bear is making lots of noise |
| D．Ann was making air pollution |
| A．A poem. | B．A story. | C．An interview. | D．An introduction. |
【推荐1】The Ministry of Industry and Information Technology has issued(颁发)commercial licenses(商用许可证) for 5G on June 6,2019,according to China Central Television.
Four major telecom carriers(电信运营商)- China Telecom， China Mobile， China Unicom and China Broadcasting Network-received the first batch of four 5G commercial licenses, said the report.
In May, Chinese companies own more than 30 percent of all essential patents(专利)relate to international standards for 5G, according to China Daily report.
The next-generation technology is expected to be at least 10 times faster than 4G, and its huge capacity(容量)to connect things will enable smart factories, self-driving vehicles and other ways, the report said.
China's big three telecom carriers are forecast(预计 )to spend $134 billion to $223 billion) in total on 5G network construction(建设) from 2020 to 2025, according to a report from the China Academy of Information and Communications Technology.
China is set to become the world's largest 5G market by 2025, with 460 million 5G users, according to a forecast by the Global System for Mobile Communications Association, an industry group.
1. How many 5G commercial licenses have been issued in China?| A．One | B．Three | C．Four | D．Five |
| A．On May 15,2018 | B．On June 6,2018 | C．On May 15,2019 | D．On June 6,2019 |
| A．6G | B．5G | C．small children | D．young people |
| A．To make people less interested in 5G. |
| B．To explain why Chinese are so proud. |
| C．To offer information on 4G network construction. |
| D．To introduce China's new development of science and technology. |
【推荐2】
Humans enjoy talking to their dogs. If you have a four-legged friend of your own, you might have taught them to respond to commands (命令) like “sit” and “stay”. While it’s true that they may not be able to take in much of what you’re saying, a new study has suggested that dogs can understand more than you might think.
Scientists carried out an experiment that focused on nouns (words for things). Eighteen dogs were taken to the lab, and their owners brought five objects their pets knew well, including shoes, toys and balls. For the experiment, the owners said the name of an object. Then they showed their dog either the object that matched the word or a different one. The dogs wore special devices (仪器) on their heads that were used to record their brain activity.
For 14 of the 18 dogs, brain activity was different when the object matched the word, compared to the activity if the word and object didn’t match. This brain activity was similar to the brain activity humans show in the same kind of situation.
“The dog was thinking. ‘I heard the word, now the object needs to come.’” says Lilla Magyari, a scientist at the University of Stavanger in Norway.
Why, then, do some dogs refuse to get a ball or a toy back at their owners’ command? “It might be that the dogs don’t really care enough about the game,” says Holly Root-Gutteridge, a dog behavior researcher at the University of Lincoln in England. “Your dog may understand what you’re saying but choose not to act.”
Moving forward, researchers are curious to know whether other animals can match words with objects, or whether this ability is special to dogs.
1. What does the experiment about dogs focus on?| A．Teaching them to do things for their owners. | B．Studying their understanding of nouns. |
| C．Recording their brain activity during playtime. | D．Training them to wear devices on their heads. |
| A．Making comparisons. | B．Setting models. | C．Doing surveys. | D．Listing ideas. |
| A．They are too tired to play. | B．They are afraid of the object. |
| C．They are not interested in the game. | D．They don’t understand the command. |
| A．Dog Training: Brain Activities | B．Pet Raising: Choices Making |
| C．Dog Understanding: Object Names | D．Pet Communication: Words Matching |
1. What are healthy food?
| A．Vegetables . | B．Hot dogs . |
| C．Hamburgers . | D．Ice-cream |
| A．The doctor goes away when he sees an apple . |
| B．The doctor can’t find good apples . |
| C．The doctor likes eating apples very much . |
| D．You eat an apple every day and you can be healthy . |
| A．Playing computer | B．Doing sports |
| C．Watching TV | D．Buying fruits |
