Scientists are closely concerned with the structure of buildings and with the quality of building materials． The World health Organization （WHO) observes that the introduction of air conditioning and energy conservation （保护) measures have been accompanied by growing problems of indoor air quality． Some pollutants arise from insulation （隔音) products, some from moving cars, and others from modern housing materials． As many Europeans spend up to 90% of their lives in buildings, the health effects of the indoor climate are very important．
　　Some construction materials, including fiberboard, insulation foams and certain glues for man-made wood floor boards, for example, give out organic products such as formaldehyde （甲醛)． Heat and humidity increase the release of formaldehyde and the gas seriously harms the eyes． Paint, lacquer, etc． can also release dangerous gas into indoor air．
　　Construction materials can cause serious damage, especially when they contain asbestos（石棉）． Asbestos is naturally present in rock formations worldwide． It belongs to a family of mineral substances made up of solid, non-combustible（非易燃品） fiber． These properties make asbestos a highly sought-after construction material． As early as 1931, however, public health officers in the United Kingdom revealed the connection between breathing in asbestos dust and such diseases as lung cancer．
　　The land on which a building is sited may also contribute to pollution． Some kinds of granite or similar rocks contain traces of radium． As it breaks down, this naturally radioactive element produces some kind of radioactive gas that goes through tiny cracks in walls, floors and building materials, and makes its way into the building and the rooms． The better the homes are insulated, the more is the dangerous gas in indoor air． The main effect of this dangerous gas on health is to increase the risk of lung cancer．
【小题1】What is the main idea of the passage?

Tristan da Cunha, a 38 –square –mile island, is the farthest inhabited island in the world, according to the Guinness Book of Records. It is 1,510 miles southwest of its nearest, St. Helena, and I, 950 miles west of Africa. Discovered by the Portuguese admiral (上将) of the same name in 1506, and settled in 1810, the island belongs to Great Britain and has a population of a few hundred.

Coming in a close second –and often wrongly mentioned as the most distant land –is Easter Island, which lies 1,260 miles east of its nearest neighbor, Pitcairn Island, and 2,300 miles west of South America.

The mountainous 64 –square –mile island was settled around the 5th century，supposedly by people who were lost at sea. They had no connection with the outside world for more than a thousand years, giving them plenty of time to build more than 1,000 huge stone figures, called moai, for which the island is most famous.

On Easter Sunday, 1722, however, settlers from Holland moved in and gave the island its name. Today, 2,000 people live on the Chilean territory (智利领土). They share one street, a small airport, and a few hours of television per day.

It can be learned from the text that the island of Tristan da Cunha ________.

A. was named after its discoverer

B. got its name from Holland settlers

C. was named by the British government

D. got its name from the Guinness Book of Records

Which of the following is most famous for moai?

A. Tristan da Cuha.  B. Pitcairn Island.  C. Easter Island.  D. St. Helena.

Which country does Easter Island belong to?

A. Britain.   B. Holland.   C. Portugal.   D. Chile.

To my family and friends,
I have just started my tour of the area badly affected by the war. Everything is going really well, so no   16 . The land is beautiful but unfortunately it has a lot of   17  too. Let me   18 .
Last week, 120 school girls were   19  by a gas leak（泄漏）. Most have recovered but six are still in   20 . Even though the local government speaks about the   21 of education, most of the kids here only attend school for four hours a day if they are lucky. They are so excited and   22  to learn, but then have to   23  things like being attacked. Most of these kids are   24  and can’t afford a pencil or even paper. So I’m planning a trip to several schools to talk about   25  and to give these kids some of the   26  they need. That is where all of you can help. If you can   27  whatever school supplies you have available, that would be   28  appreciated.
I know how busy you are so thank you for taking the   29  to do this and I will post pictures of this   30  after I return.
Thank you again.
Todd Tucker

Scientists are closely concerned with the structure of buildings and with the quality of building materials． The World health Organization （WHO) observes that the introduction of air conditioning and energy conservation （保护) measures have been accompanied by growing problems of indoor air quality． Some pollutants arise from insulation （隔音) products, some from moving cars, and others from modern housing materials． As many Europeans spend up to 90% of their lives in buildings, the health effects of the indoor climate are very important．

　　Some construction materials, including fiberboard, insulation foams and certain glues for man-made wood floor boards, for example, give out organic products such as formaldehyde （甲醛)． Heat and humidity increase the release of formaldehyde and the gas seriously harms the eyes． Paint, lacquer, etc． can also release dangerous gas into indoor air．

　　Construction materials can cause serious damage, especially when they contain asbestos（石棉）． Asbestos is naturally present in rock formations worldwide． It belongs to a family of mineral substances made up of solid, non-combustible（非易燃品） fiber． These properties make asbestos a highly sought-after construction material． As early as 1931, however, public health officers in the United Kingdom revealed the connection between breathing in asbestos dust and such diseases as lung cancer．

　　The land on which a building is sited may also contribute to pollution． Some kinds of granite or similar rocks contain traces of radium． As it breaks down, this naturally radioactive element produces some kind of radioactive gas that goes through tiny cracks in walls, floors and building materials, and makes its way into the building and the rooms． The better the homes are insulated, the more is the dangerous gas in indoor air． The main effect of this dangerous gas on health is to increase the risk of lung cancer．

What is the main idea of the passage?

    A．Some building materials pollute indoor air．

    B．Some factors cause indoor air pollution．

    C．Asbestos can cause lung cancer．

    D．The land on which houses are built contributes to indoor pollution．

Why are Europeans particularly concerned with building materials?

    A．Lots of building materials there are radioactive．

    B．They stay home up to 90% of their lives．

    C．They have a high rate of lung cancer．

    D．They spend most of their time indoors．

Why is asbestos a sought-after building material?

    A．It is a kind of insulation foam．

    B．Asbestos will not give out dangerous gas．

    C．This material is not easy to catch fire．

    D．It is rarely present in rock formations．

Why should we be careful about the land on which a building is to be sited?

    A．To determine whether the land is firm enough for a building to be sited on．

    B．To make sure that the land contains no radioactive material．

    C．To make certain that the land releases no formaldehyde or other gases．

    D．To check whether it contains any combustible materials．

Imagine, one day，getting out of bed in Beijing and being at your office in Shanghai in only a couple of hours，and then，after a full day of work，going back home to Beijing and having dinner there．
Sounds unusual，doesn't it? But it's not that unrealistic，with the development of China’s high-speed railway system．And that’s not all．China has an even greater high-speed railway plan — to connect the country with Southeast Asia，and eventually Eastern Europe．
China is negotiating to extend its own high-speed railway network to up to 17 countries in 10 to 15 years，eventually reaching London and Singapore．
China has proposed three such projects．The first would possibly connect Kunming with Singapore via Vietnam and Malaysia．Another could start in Urumqi and go through Kazakhstan and Uzbekistan，and possibly to Germany．The third would start in the northeast and go north through Russia and then into Western Europe．
If China’s plan for the high-speed railway goes forward，people could zip over from London to Beijing in under two days．
The new system would still follow China’s high-speed railway standard．And the trains would be able to go 346 kilometers an hour.
China’s bullet train（高速客车），the one connecting Wuhan to Guangzhou，already has the World’s fastest average speed．It covers 1,069 kilometers in about three hours．
Of course，there are some technical challenges to overcome．There are so many issues that need to be settled，such as safety，rail gauge（轨距），maintenance of railway tracks．So，it’s important to pay attention to every detail．
But the key issue is really money．China is already spending hundreds of billions of yuan on domestic railway expansion．
China prefers that the other countries pay in natural resources rather than with capital investment．Resources from those countries could stream into China to sustain development．
It’ll be a win-win project． For other countries，the railway network will definitely create more opportunities for business，tourism and so on，not to mention the better communication among those countries．
For China，such a project would not only connect it with the rest of Asia and bring some much-needed resources，but would also help develop China’s far west．We foresee that in the coming decades，millions of people will migrate to the western regions，where the land is empty and resources unused．With high-speed trains，people will set up factories and business centers in the west once and for all．And they’ll trade with Central Asian and Eastern European countries．
【小题1】China’s new high-speed railway plan will be a win-win project because ________.