*Question*
Read the following article and select the best answer. Article: Hong Kong (CNN)--A Dutch artist and designer has come up with a device he hopes will suck pollutants from Beijing's smog-covered skies, creating columns of clean air for residents. An electromagnetic field caused by copper coils will pull small pieces in the smog to the ground where they can be easily cleaned. "It's like when you have a balloon which has electricity and your hair goes toward it.Same with the smog," says artist Daan Roosegaarde.His studio has reached an agreement with the Beijing government to test the technology in one of the capital's parks.With its skies regularly covered by filthy gray smog, Beijing this week announced a series of emergency measures to deal with the problem in public. Roosegaarde says an indoor experiment has already proved it works and he is confident the results--with the help of a team of scientists and engineers--can be copied outside."Beijing is quite good because the smog is quite low. It's in a valley so there's not so much wind.It's a good environment to explore this kind of thing.We'll be able to purify the air and the challenge is to get rid of the smog so you can see the sun again." Roosegaarde acknowledges that projects like this are a way of drawing attention to the problem, rather than a complete solution to Beijing's serious and terrible air pollution."This is not the real answer for smog.The real answer has to do with clean cars, different industry and different lifestyles," he says. However, he hopes the project will make a difference by allowing the city's residents to realize the difference between breathing clean and smog-filled air."I want to take a park in Beijing, 50m by 50m square, and make it the cleanest park in Beijing," he says.He is still discussing with local authorities which park will be used. Roosegaarde's studio has worked on several projects that use static electricity in unusual ways:creating a road that charges electric cars and a floor that generates electricity when danced on. Question: Roosegaarde's device . - is designed to suck hair - can produce power - can purify the polluted air - is equipped with a balloon
**Answer**
can purify the polluted air

*Question*
Read the following article and select the best answer. Article: Most of us would like to have glowing skin, especially as we get older. The good news is that you don't have to wait until summer to catch some sun rays. Scientists have found eating plenty of fruit and vegetables is by far the best way to achieve a healthy, golden glow. Dr. Ian Stephen said, "Most people think that the best way to improve their skin color is to get a suntan . But our research shows that eating lots of fruit and vegetables is actually more effective." The team first assessed the skin color of people in relation to their diet. Those who ate more fruit and vegetables a day were found to have a more golden, yellow skin color. Those with a healthy glow had a higher presence of carotenoids , which play a role in the immune system. Carotenoids are commonly found in fruit and vegetables such an yellow and red peppers, spinach, apricots and melons. The team then studied the relation between skin tone and attractiveness. They used specialist software to operate the skin color on the images of 51 faces to simulate more or less carotenoids and suntans. Participants were then asked to adjust the skin color to make the faces look as healthy as possible. Given the choice between skin color enhanced by suntans and skin color enhanced by carotenoids, people preferred the carotenoids skin color. The study shows that not only do people use skin color to judge how healthy other individuals are, but they are accurate when they make those judgments. While this study focus on Caucasian faces, it suggests this phenomenon may exist across cultures, since similar preferences for skin yellowness are found in an African population. Question: Which statement is TRUE according to the text? - Carotenoids are only found in the fruit. - Carotenoids are important in the immune system - Carotenoids can be improved by catching sun rays. - Carotenoids are the only factor that affects the skin color.
**Answer**
Carotenoids are important in the immune system

*Question*
Read the following article and select the best answer. Article: While all my classmates seen to be crazy about a one-way ticket to Mars , I'd rather say Mars is totally unsuitable for human existence. People won't have enough food supplies there, and the terrible environment would make it impossible for them to live a long life. Besides, the journey won't be safe. Can anybody explain to me just why people would go to Mars, never to return? Steve Minear, UK Here are the things you can think of: the desire to explore a foreign and unique environment, the excitement of being the first humans to open up a new world, the expectation of fame and glory...For scientists there is another reason. Their observations and research will probably lead to great scientific achievements. Donal Trollop, Canada There are already too many people on the Earth. I think that sometime before the end of the century, there will be a human colony on Mars. It will happen when people finally realize that tow-way trips to the red planet Mars are unnecessary. Most of the danger of space Flight is in the launches and landings. Cutting the trip home would therefore reduce the danger of accidents, save a lot of money, and open the way to building an everlasting human settlement on another world. Enough supplies can be sent on ahead. And every two years more supplies and more people will needs, and Mars is far more pleasant than the other planets in the outer space. Paul Davies. USA Question: What does Paul Davies think of human existence on Mars? - Humans will have to bring all they need from the Earth. - Humans will find Mars totally unsuitable for living. - Humans can produce everything they need. - Humans can live longer in the colony on Mars
**Answer**
Humans can produce everything they need.

*Question*
Read the following article and select the best answer. Article: Because phones have caused many problems, many head teachers have ordered that pupils must keep their phones switched off at school. Others have told pupils to leave them at home. However, Dr Elizabeth Hartnell-Young at the University of Nottingham believes it is time that phone bans were reassessed--because mobile phones can be a powerful learning aid, they say. "At the start of the study, even pupils were often surprised at the thought that mobile phones could be used for learning," Dr Hartnell-Young says. "After their hands-on experience, almost all pupils said they had enjoyed the project and felt more motivated. "Some teachers also had to reassess their views. "Using this technology gives them more freedom to express themselves without needing to be constantly governed." one said. Other teachers found that pupils who lacked confidence gained most from the project. However, they recognized that greater use of mobile phones in schools could prove troublesome. Increased temptation to steal phones was one worry. "I thought, well, four of these smart phones are going to end up on e-BAY tomorrow," one teacher said. A few teachers remained concerned that phones could prove a distraction for some pupils. Allowing pupils to access school emails via mobiles would also bring risks if passwords were shared, they said. Dr Hartnell-Young says that the teachers' worries are understandable. "While the eventual aim should be to cancel overall bans on phones we do not recommend immediate, whole-school change," she said. "Instead we believe that teachers, students and the wider community should work together to develop policies that will enable this powerful new learning tool to be used safely. We hope that, in future, mobile phone use will be as natural as using any other technology in school." Question: Which of the following can be the best title of this passage? - Temptation from Mobile Phones - The Mobile Phone Using Ban - Mobile Phones, a Powerful Learning Aid - Yes or No for Using Cell phones at School
**Answer**
Yes or No for Using Cell phones at School