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Air pollution in many cities has been more and more serious.Especially in winter，we see a lot of foggy days in North China.PM 2.5 in the air can harm human health.PM 2.5 refers to small particles(颗粒) which are 2.5 micrometers(微米) or less in diameter.

What's the cause of PM 2.5 pollution?

Daily average particulate pollution (PM 2.5)

The 10 worst Chinese cities

The cities in North China are facing a more serious situation than the other parts.For example，Shenzhen and Guilin in the south of China are regarded as smog－free cities.While some cities，like Xingtai，Shijiazhuang and Baoding are among the most polluted cities.

1.What does PM 2.5 refer to?

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2.What causes the most pollution in Beijing according to the chart？What percent is it?

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3.Are Shenzhen and Guilin smog cities?

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4.Which Chinese city is polluted most seriously according to the chart?

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5.What will you do to reduce air pollution?

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Researchers in Britain are telling schools that children should do more learning outdoors.

The researchers say there is currently(目前) too much focus on sitting in classrooms to pass exams.They say outdoor learning is important for students' social skills，health and development.1. There have been five major reports over the past ten years that stress(强调) the need for students to learn outdoors and experience nature more.

2. They say outdoor learning is on the decline (在消减) in Britain.The researchers want Britain's government to act to put outdoor learning on the curriculum(课程) of all schools.

The report is from researchers at the University of Plymouth and the organization Natural England.3.One advantage is that it builds confidence in children as they experience things that are normal for their parents，like climbing trees.4. There are also health benefits as children exercise more instead of sitting in a classroom or being at home with video games.A final benefit is that it helps with the problem of what is class “stranger danger”．5.

A．The researchers say that schools are not taking the advice of these reports.

B．Another advantage is that it makes children more aware of the environment and teaches them to respect nature.

C．It says there are many benefits of outdoor learning for children.

D．This is an idea many children in the UK today grow up hearing.

E．It also increases their quality of life.

F．These days parents push their kids too much.

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Some people believe that schools will be no longer necessary in the future.They said that because of the Internet and other new technology，there is no longer any need for school building，classes or teachers.Perhaps this will be true one day，but if the world has no schools，I can't imagine how our society will be.In fact，we should learn how to use new technology to make schools better.We should invent a new kind of school that is connected to libraries，museums，science centers，labs and so on.And learning programs should be created for schools.Teachers could give lessons online.TV network and local stations could develop programs about things students are studying at school.Labs could set up websites to show new technology so that students could see it on the Internet.

Is it a dream？No.There are already many cities where this is beginning to happen.Here the whole city is connected to the Internet，and learning can take place at home，at school and in the office.Businesses provide programs for the schools and the society.The schools provide computer labs for people who don't have their own computers at home.Because everyone can go on the Internet，older people use it as much as younger ones.And it's very easy for everyone to visit faraway libraries and museums.How will this new kind of school change the usual way of learning？It is too early to be sure，but it is very exciting to think about it.Technology will change the way we learn；schools will change as well；and we will all learn something from the Internet.

I _______ carefully, but can't ________ anything.

A. listen; hearing B. listening; hear C. hearing; listen D. listen; hear

I often laugh when I see my grandma learning pop songs. But she says, "One is never __old to learn.

A. too B. so C. very D. quite

You drive your car so fast. It’s dangerous.

A. wouldn’t B. shouldn’t C. couldn’t D. mightn’t

---_____________ the earthquake in Ludian is !

---Yes, we should try our best to help them.

A. What terrible B. How terrible C. How terribly D. What terribly

—Did you go to Jim? s birthday party? —No, I_____________.

A. am not invited B. wasn?t invited

C. haven?t invited D. didn?t invite

________ important information the students have collected about traditional festivals !

A. How B. What an C. What D. What a

---Mum, must I stay there the whole day?

---No, you ___________ . You may come back after lunch, if you like.

A. can't B. won't C. needn't D. mustn't