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．

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Invitation

A woman came out of her house and saw three old men with long white beards sitting in her front yard. She thought they were hungry and invited them in to have something to eat.

They refused because her husband was out.

  71  “Go to tell them I am home and invite them in!” The woman went out and invited them in. “We do not go into a House together,” they replied. “Why is that?” she wanted to know.

One of the old men explained: “His name is Wealth,” he said pointing to one of his friends, and said pointing to another one, “He is Success, and I am Love.” Then he added, “Now go in and discuss with your husband which one of us you want in your home.”

The woman went in and told her husband what was said. Her husband was overjoyed. He said “  72   Let him come and fill in our home with wealth!”

His wife disagreed. “My dear, why don’t we invite Success?” Their daughter-in-law was listening from the other corner of the house. She jumped in with her own suggestion: “Would it not be better to invite Love?   73  ”

The woman went out and asked the three old men, “Which one of you is Love? Please come in and be our guest.”

Love got up and started walking toward the house.  74   Surprised, the lady asked Wealth and Success: “I only invited Love. Why are you coming in?”

The old men replied together: “If you had invited Wealth or Success, the other two of us would’ve stayed out, but since you invited Love, wherever he goes, we go with him.  75  ”

The other two also got up and followed him.

Our home will then be filled with love!

In the evening when her husband came home, she told him what had happened.

They were very happy to be invited.

Wherever there is Love, there is also Wealth and Success!

He loved money badly.

Let us invite Wealth.

Photos that you might have found down the back of your sofa are now big business!

In 2005,the American artist Richard Prince’s photograph of a photograph,Untitled (Cowboy),was sold for $1 248 000.

Prince is certainly not the only contemporary artist to have worked with so-called “found photographs”—a loose term given to everything from discarded(丢弃的)prints discovered in a junk shop to old advertisements or amateur photographs from a stranger’s family album.The German artist Joachim Schmid,who believes “basically everything is worth looking at”,has gathered discarded photographs,postcards and newspaper images since 1982.In his on-going project,Archiv,he groups photographs of family life according to themes:people with dogs;teams;new cars;dinner with the family;and so on.

Like Schmid,the editors of several self-published art magazines also champion(捍卫)found photographs.One of them,called simply Found,was born one snowy night in Chicago,when Davy Rothbard returned to his car to find under his wiper(雨刷)an angry note intended for someone else:“Why’s your car HERE at HER place?”The note became the starting point for Rothbard’s addictive publication,which features found photographs sent in by readers,such as a poster discovered in your drawer.

The whole found-photograph phenomenon has raised some questions.Perhaps one of the most difficult is:can these images really be considered as art?And,if so,whose art?Yet found photographs produced by artists,such as Richard Prince,may raise endless possibilities.What was the cowboy in Prince’s Untitled doing?Was he riding his horse hurriedly to meet someone?Or how did Prince create this photograph?It’s anyone’s guess.In addition,as we imagine the back-story to the people in the found photographs artists,like Schmid,have collated(整理),we also turn toward our own photographic albums.Why is memory so important to us?Why do we all seek to freeze in time the faces of our children,our parents,our lovers,and ourselves?Will they mean anything to anyone after we’ve gone?

In the absence of established facts,the vast collections of found photographs give our minds an opportunity to wander freely.That,above all,is why they are so fascinating.

1.The first paragraph of the passage is used to_______.

A.remind readers of found photographs

B.advise readers to start a new kind of business

C.ask readers to find photographs behind sofas

D.show readers the value of found photographs

2.According to the passage,Joachim Schmid_______.

A.is fond of collecting family life photographs

B.found a complaining note under his car wiper

C.is working for several self-published art magazines

D.wondered at the artistic nature of found photographs

3.The underlined word “them”in Paragraph 4 refers to“_______”.

A.the readers

B.the editors

C.the found photographs

D.the self-published magazines

4.By asking a series of questions in Paragraph 5,the author mainly intends to indicate that_______.

A.memory of the past is very important to people

B.found photographs allow people to think freely

C.the back-story of found photographs is puzzling

D.the real value of found photographs is questionable

5.The author’s attitude toward found photographs can be described as_______.

A.critical                                  B.doubtful

C.optimistic                                D.satisfied