Question: Read the following article and select the best answer. Article: I remember my' mother as a strong woman. She came to America when she was 12-old enough to remember her language, she achieved scores and grades high enough to be admitted to Duke University. With a degree in computer science, she finally became the manager of a company in New York. My mother could give fluent speeches, say "wolves" correctly. It was my mother who always stressed the importance of language. From the time l was born,1 was read to. 1 would fall asleep to the sounds of my parents' voices, whether it was my dad's softly accented, or my mother's clear English. The flow of language was unbroken, and whether in Chinese or English , the stream of communication flowed through our house. One October morning in sixth grade, after my mother had left to catch the train to the city ,I left the house for the bus stop. 1 was surprised when I saw our car, the door hanging open. As I drew closer ,I saw my mother lying on the ground. In the hospital, it was hard to believe that the lady who lay before me was my mom. My mother could not remember my name. As the leaves changed colors, it became clear that the stroke had created a wall between my mother's mind and mouth: her mind was not any less clear, but the words she spoke were not what she meant. The battle my mother faced taught me the importance of language. Without it, identity does not exist; relationships cannot be formed; stories cannot be told; directions cannot be given, and knowing any-thing about anyone is impossible. Without language, communication cannot take place. Without language, one cannot express the beauty of a sunset or the kindness of a stranger. The world would pass us by in silence. Question: This passage is mainly about _ . - a strong mother - the importance of language - a family disaster - the significance of teaching language
Answer: the importance of language

Question: Read the following article and select the best answer. 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 _ . - our taste experience can be influenced by color - red-colored food are 20% sweeter than green food - people prefer red-colored food to green food - before eating, people watch food for a long time
Answer: our taste experience can be influenced by color

Question: Read the following article and select the best answer. 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 _ . - plants are very useful to human beings - indoor plants can help remove indoor air pollution - indoor plants should be raised in both homes and offices - NASA have studied indoor plants for many years
Answer:
indoor plants can help remove indoor air pollution