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.

Eat to Excel

How fit are you? Do you look after yourself? Do you eat healthily or do you eat anything you like? Premier League football club Aston Villa are encouraging their players and local children to eat healthy food. They know that what you eat is the key to success.

How fit is a footballer?

Could you run ten kilometers in 90 minutes? A professional footballer can. Footballers have to be strong, quick, skillful and creative in their moves. Every Premier League club makes sure it has a good coaching scheme and a well-planned fitness program. They also ensure that players have the practice and training that will prepare them for matches. What else do you think clubs pay special attention to? A good stadium? Anything else? What about the food they eat?

Eating the right thing

A good diet is a fundamental part of sport these days. Aston Villa manager Martin O’Neill’s sport and health experts have chosen a secret weapon --- organic food (food grown without chemicals). Fitness manager Jim Henry eats with his players and said: “I chose to switch to organic food for Aston Villa because I’ve read studies showing that organic food has higher levels of vitamins, minerals and antioxidants.” He believes that the best way to get these is to eat the very best fresh food.

What to eat after the match

Head chef at Aston Villa, lan Edge, feeds players with the best food as soon as they finish an away match. He says: “Food is very important to sports stars and particularly after a game. There is an hour of opportunity when they need to eat to get the best muscle strength, so I hand out meals on the coach on the way home. If we can make one per cent difference to the players by using organic food, then it is worth it.”

Teaching healthy eating

Everyone at Aston Villa enjoys organic food at their training ground. But the club is also worried about the unhealthy diet among local children who prefer sweets and unhealthy fast food. As part of their work in the community, Aston Villa has opened up their kitchen and invited children from local schools to come and learn how to cook with the help of the Villa head chef. Villa midfielder, Nigel ReoCoker, visited the children on the opening day. “The kitchen promotes healthy eating and a healthy lifestyle.” he said.

A final word from the kitchen

Head chef Ian says: “Footballers know how important food is to their profession and nine times out of ten, they go for the healthiest option.” Do you watch your diet? If you do and you keep yourself fit, you can be a winner!

Every Premier League Club provides footballers with ______________.

A. a good coach

B. a fitness center

C. proper practice and training

D. a delicious diet

According to Jim Henry, ___________________.

A. he believes the studies he has read about organic food

B. he will only eat organic food with his players

C. he thinks food is especially important after a game

D. he chose organic food as a secret weapon for footballers

We can learn from the passage that ___________________.

A. people can make one percent difference to players by using organic food

B. only a few footballers pay attention to the healthy eating

C. footballers in Aston Villa usually eat on their way to the match

D. footballers in Aston Villa usually eat some food within an hour after a match.

Why has Aston Villa invited children from local schools?

A. Because they want to teach kids how to cook delicious food.

B. Because they want to teach kids to play football.

C. Because they are fond of the kids in the community.

D. Because they intend to promote healthy eating.

High-tech machines have made life easier for millions around the world. However, some people still prefer low-tech ways of doing things. Here’s an example of why this is happening. You can microwave a frozen hamburger in 60 seconds. However, it won’t taste as good as one you cook on the stove. And if you’re in that much of a hurry, you probably won’t take time to toast the bun. High-tech cooking saves time, but it doesn’t make for better-tasting meals.

Most people get their news from high-tech sources like television or the Internet. This has many advantages. For example, electronic news is more up to date than newspapers or magazines. It’s also more exciting to see live and videotaped news events than photographs. However, newspapers and magazines have some important advantages. They give more background and details. They also let you read the parts that are important to you and skip the rest.

Other high-tech timesavers have similar disadvantages. For examples, most people use the phone or e-mail to stay in touch with friends and family members who live in other places. But when you use the Internet or the phone, you don’t always think carefully about what you are saying, and sometimes you forget the important things you want to communicate. Similarly, when you word-process a homework assignment instead of handwriting it, you can check your spelling electronically and put in fancy headings. However, some students are so busy with the computer that they don’t pay enough attention to the actual words they are writing.

Which of the following statements is TRUE according to the passage?

A. The writer likes high-tech cooking.

B. Low-tech cooking produces better-tasting meals.

C. High-tech news programs always keep you reading what is important to you.

D. Handwritten homework is better than word-processed homework.

How does the writer feel about high-tech tool?

A. Better late than never.      B. Easy come, easy go. 

C. Every coin has two sides.   D. Learn to walk before you run.

What is the main subject discussed in the text?

A. High-tech vs. low-tech.    

B. Advantages vs. disadvantages.

C. Newspapers and magazines vs. television and the Internet.

D. Word-processing vs. handwriting.

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