Question: I'm taking a test and have to guess the right answer to the question after the article. Article: A Dutch artist and designer has come up with a device which he hopes will get rid of pollutants from Beijing's smog skies, creating clean air for the city's mask-wearing people. An electromagnetic field will pull particles in the smog to the ground where they can be easily cleaned. "It's like when you have a balloon which has static 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 tile capital's parks. With its skies regularly covered by dirty gray smog, Beijing this week announced a series of emergency measures to handle the problem. Roosegaarde says an indoor model device has already proven it works and is confident that the results -- with the help of a team of scientists and engineers -- can be replicated outside. "Beijing is quite a good place because the smog in Beijing is quite low. It lies 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 the top 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 practical solution to Beijing's awful air pollution. "This is not the real answer for smog. The real answer has to do with clean cars, different industry and different lifestyles." However, he hopes the project will make a "fundamental statement" by allowing the city's people to realize the difference between breathing clean and smog-filled air. Question: Roosegaarde appeals to people in Beijing to _ . Options: A: pay attention to air pollution and solve the problem finally B: invent more devices to clean the smog in Beijing C: drive modern cars and try different lifestyles D: realize how serious the pollution they're facing is
Answer: A

Question: I'm taking a test and have to guess the right answer to the question after the article. Article: In 1975, George Carlin appeared on a popular TV show, Saturday Night Live, with his famous words about blue food. "Why is there no blue food? I can't find blue food--I can't find the flavor of blue! I mean yellow is lemon; orange is orange and red is cherry. Where is the blue food? " Well, Carlin pretty much has it right--there's not no blue food, but there's certainly not a lot of it. Fresh-picked blueberries are blue, though they become purple when they are turned into jam. The blue in blueberries--like the purple in grapes and the red in tomatoes--is found in nature. But it isn't a hot color for food. People don't seem to prefer blue food. Some diet programs even suggest that those determined to lose weight should make their food blue. Eating, in part, begins with our eyes. Charles Spence--an experimental psychologist from Oxford University--points out that color can change our taste experience. Commonly, we consider red-colored foods up to 20% sweeter than they actually are; and green foods as being more sour. Spence suggests: human expectations may be influenced by our long history of watching - green fruits can become sweet as they grow up and turn red. But what about blue? Except blueberries, much of the blue food we see these days _ blue artificially. Food producers argue that artificial color doesn't do much harm to health. A lot of research shows that some physical problems of kids are related to food dyes--while other studies show no effects at all. Blue birthday cake or even blue-dyed chicken can be served on the dinner table. So what? Question: Eating sometimes begins with our eyes because _ . Options: A: our taste experience can be influenced by color B: red-colored food are 20% sweeter than green food C: people prefer red-colored food to green food D: before eating, people watch food for a long time
Answer: A

Question: I'm taking a test and have to guess the right answer to the question after the article. Article: Common indoor plants may prove to be a valuable weapon in the fight against rising levels of indoor air pollution. Those plants in your office or home are not only pretty, but NASA scientists are finding them to be surprisingly useful in absorbing possible harmful gases and cleaning the air inside modern buildings. NASA have announced the finds of a 2-year study that suggested the common indoor plants may provide a natural way of helping fight against "Sick Building Syndrome ". Research into the use of biological processes as a means of solving environmental problems, both on Earth and in space habitats, has been carried out for many years by Dr. Bill Wloverton, a senior research scientist at NASA. Based on preliminary evaluations of the use of common indoor plants for indoor air purification ,NASA funded a study using about a dozen popular varieties of attractive plants to determine their effectiveness in removing several key pollutants linked with indoor air pollution. NASA research on indoor has found that living plants are so efficient at absorbing pollutants in the air that some will be launched into space as part of the biological life support system aboard future orbiting space stations. While more research is needed, Wolverton says the study has shown that common indoor plants can remove certain pollutants from the indoor environment. "We feel that future results will provide an even stronger argument that common indoor plants can be a very effective part of a system used to provide pollution free homes and work places," he concludes. "Combining nature with technology can increase the effectiveness of plants in removing air pollutants," he said. NASA research has always shown that living, green and flowering plants can remove several poisonous chemicals from the air inside buildings. You can use plant in your home or office to improve the quality of the air to make it a more pleasant place to live and work--where people feel better, perform better, and enjoy life more. Question: The main idea of the passage is _ . Options: A: plants are very useful to human beings B: indoor plants can help remove indoor air pollution C: indoor plants should be raised in both homes and offices D: NASA have studied indoor plants for many years
Answer:
B