Air pollution is a big problem for cities in ...

Air pollution is a big problem for cities. Many people are dying from it. But how can we tell the air quality(质量) is good or bad?

Joris Lam has invented a birdhouse that can tell us about the air quality. On a tree next to a canal (运河) in Amsterdam, a small birdhouse will shine bright green when the air is clean. If you are standing near the birdhouse, it will also give you a free Wi-Fi connection. So Joris’s 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 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 doesn't shine, people will care more about the environment. It tells them to change their lifestyles. For example, to protect the air, they can ride bikes instead of driving cars.

Joris and his team are trying to make some changes to the birdhouse. In the future, the heat of its green light will be used to keep birds warm in winter.

1、2题完成句子；3题简略回答问题；4题找出并写下第二段的主题句；5题将文中画线句子译成汉语。

1.Many people die because of the ______.

2.When the air is ______, the small birdhouse will shine bright green.

3.Why is Joris’s birdhouse called TreeWifi?

__________________________________________________________

4.____________________________________________________

5.____________________________________________________

九年级英语多任务混合问题中等难度题查看答案及解析

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

九年级英语阅读单选中等难度题查看答案及解析

The world itself is becoming much smaller by using modern traffic and modern communication means (通讯设备). Life today is much easier than it was hundreds of years ago. But it has brought new problems. One of the biggest is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.

Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, man moved to another place. But this is no longer true. Man is now slowly polluting the whole world.

Air pollution is still the most serious. It’s bad for all living things in the world, but it is not the only kind of pollution. Water pollution kill our fish and pollutes our drinking water. Noise pollution makes us angry more easily.

Many countries are making rules to fight pollution. They stop people from burning coal in houses and factories in the city, and from putting dirty smoke into the air. Pollution by SO2 is now the most dangerous kind of air pollution. It is from heavy traffic. It is true that if there are fewer people driving, there will be less air pollution.

The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must take care of the rise in population at the same time.

1.What is the most serious pollution?

_______________________________________________________

2.How many kinds of pollution are mentioned in the passage?

_______________________________________________________

3.Do you think it is necessary to take care of the rise in population? Why?

_______________________________________________________

九年级英语回答问题中等难度题查看答案及解析

Air is around us. However, with the development of modern society, air pollution has become one of the most serious problems in the world today. People polluted the air with gas and smoke produced by machines. 1.

2. Automobiles and planes cause pollution, but they provide people with transportation. Factories cause air pollution, too, but they provide people with jobs and products. In crowded cities, thousands of automobiles and factories can add tons of pollution to the air every day.

3. It makes the clear sky look cloudy and the air smell bad. It is harmful to everyone's health. Air pollution damages the plants that provide us with food. Most materials are used up more quickly in polluted air than in clean air. 4.

If we want to stop pollution immediately, we have to stop using many of the machines that make life easier for us. 5. Scientists and engineers can develop automobiles that produce less pollution.

Word Bank： automobile汽车

A.Nobody likes air pollution.

B.Pollution can be stopped slowly.

C.Most of the pollution is caused by things that people need.

D.Polluted air can even damage strong materials like steel.

E.Badly polluted air can cause sickness and even death.

九年级英语补全短文5选5中等难度题查看答案及解析

Large population has caused many problems. For example, the traffic is very heavy in some big cities.

During the last ten years, big cities like Beijing and Harbin were full of cars and buses. Now the streets are completely crowded and it’s very difficult to drive a car along them. Drivers must stop at hundreds of traffic lights. What are our cities going to be like in the future? How can we solve the problem?

There are some good ideas to reduce the use of private(私人的) cars. In 1971, the officer in Rome began an interesting experiment: Passengers on the city buses didn’t pay for their tickets.

In Stockholm there was another experiment: People paid very little for a season ticket to travel on any bus, trolley bus(电车) and train all over the city.

In many cities now some streets are closed to vehicles(机动车) and pedestrians are safe there.

In London there is another experiment: Part of the streets is for buses only. So the buses can travel fast. There are no cars or taxis in front of them.

根据短文内容, 选择最佳答案。

1.The passage is about ________.

A．big cities          B．streets            C．cars              D．traffic

2.The city of ________ once experimented on a completely free bus service.

A．London           B．Paris             C．Rome            D．Stockholm

3.The city of ________ experimented on a very cheap bus service.

A．Paris             B．Stockholm         C．London           D．None of the above

4.The underlined word “pedestrians” means_________ in Chinese.

A．行人             B．司机             C．旅客             D．向导

5.In many cities, pedestrians are much safer because ________.

A．no traffic is allowed in some streets         B．traffic is computer-controlled

C．cars move very slowly                    D．only one-way streets are open to traffic

九年级英语阅读理解中等难度题查看答案及解析

Seventy percent of our planet is covered by one huge body of seawater-the ocean. In 2008, the United Nations recognized(确立) June 8 as World Oceans Day. It's a day to think about the important role that the oceans play in our lives, the dangers that our oceans are facing and the action we can take to protect them.

The ocean is home to the most of plants and animals on Earth. Plants in the sea provide us with 70 percent of O2 we breathe. The ocean controls our climate (气候), providing heat in winter and cool air in summer. It also provides us with food and medicine. No matter where you live on the planet, no matter how far from the sea, your life is dependent on the ocean.

The biggest problem facing the ocean at the moment is plastic pollution. Reducing single-use plastic, including plastic bags and plastic bottles, has been an important theme for World Oceans Day for a number of years.

Climate change and rising sea temperatures are also a huge problem. Rising sea temperatures have a direct influence on weather patterns and are seen as partly responsible for an increase in extreme (极端的) weather.

The day is celebrated in all kinds of ways, including special events on the beach, river clean-ups, school activities, art contests and film festivals. You can join in to remind people about the importance of our oceans and to make a difference.

1.What percent of our planet is covered with seawater?

A.30% B.40% C.70%

2.What is the main idea of Paragraph 2?

A.The ocean provides us with heat and cool air.

B.Our life is dependent on the ocean.

C.The ocean provides us with food and medicine

3.What is the biggest problem facing the ocean?

A.Plastic pollution. B.Reducing single-use plastic. C.Air pollution.

4.What is partly responsible for an increase of extreme weather?

A.Climate change. B.Rising sea temperatures. C.Weather patterns.

5.How do people celebrate World Oceans Day?

A.Eating out together. B.Having a meeting. C.Holding special events.

九年级英语阅读单选中等难度题查看答案及解析

Each country has many kind people who volunteer to take care of others. For example, some high school and university students in the US often spend many hours as volunteers in hospitals or old people’s homes. They read books for the people or they just visit them and play games with them or listen to their problems.

Other young volunteers go and work in the homes of the sick people. They clean up their houses or do the shopping. For boys who don’t have fathers there is an organization called “Big Brothers”. University students and other people take these boys to play baseball games and help them get to know things that boys usually learn from their fathers.

Each city has a lot of clubs where boys and girls can go to play games or take part in other activities. Some of these clubs show movies or have short trips to the mountains, the beaches or the museums. Most of these clubs use a lot of high school and university students as volunteers because they can understand the problems of these boys and girls more easily.

Volunteers believe that some of the happiest people in the world are those who help to bring happiness to others.

1.Which place is not mentioned about volunteering in the US ?

A.Sick people’s homes. B.Hospital. C.Zoos.

2.Volunteers are people who__________.

A.Get paid for helping others B.Help to take care of others C.Sell books in hospital

3.Big brothers is an organization for boys who no longer have __________.

A.fathers B.Brothers C.friends

4.Most of the clubs choose high school and college students as volunteers because______________.

A.they understand the problems of these boys and girls more easily.

B.they need money.

C.they take them to watch baseball games.

5.Which of the following is true according to the passage?

A.Volunteers only help people who are old.

B.Volunteers can earn much money from their work.

C.People who bring happiness to others are the happiest.

九年级英语阅读单选中等难度题查看答案及解析

With air pollution making much difference to many of Chinese cities, parents are calling for the installation(安装) of air cleaners in classrooms. There has been much debate over whether air cleaners should be used in China’s schools. Some parents have donated cleaners to their children’s classrooms, while others raise money together to make the purchase(购买). “Our school bought air cleaners last year. We did a little fund raising, with each parent throwing in several hundred for that,” said one parent.

However, the idea of installing air cleaners for all the classes has been refused by some schools. Liu Liangcheng, vice-principal of Beijing’s Taipinglu Primary School, says installing air cleaners bought by parents may lead to problems. “We have refused air cleaners bought by parents before, as there are clear and strict rules against educational fees. We can’t just break the rules here. And without standard guidance (指示) from local authorities(权威部门), it is hard to decide on the brand of the cleaner, installation and even safety of the device(设备).”

Moreover, experts say air cleaners can cause other health problems. Deng Gaofeng who works for the China Academy of Building Research says. “ In the classroom, if we keep windows and doors closed, the concentrations (浓度) of CO2 will double from 1,000 PPM to some 2,000 PPM. According to national safety standards, the highest level should not be more than 1,500.” In addition, experts say air cleaners on the market are mostly designed for homes or offices. Evaluation(评估) is needed to know whether they are suitable in classrooms.

It seems whether air cleaners should enter China’s schools is an ongoing question. It still requires a more detailed plan.

阅读以上信息，用恰当的单词完成下面的表格，每空一词。

Topic : Should air cleaners be installed for students in school?

九年级英语填空困难题查看答案及解析

The air pollution is a serious 　　　　　 in our country. Our government is trying to solve it.

A. choice　　 B. program　　 C. problem　　 D. opinion

九年级英语单选题中等难度题查看答案及解析

The air pollution is a serious_________in our country. Our government is trying to solve it.

A.choice B.program C.problem

九年级英语单选题中等难度题查看答案及解析