Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Chicken feathers are useful, and not just to a chicken. Some go into pillows, coats and other products. But countless chicken feathers go to waste. In the United States, billions of chickens are produced yearly. Most of their feathers are thrown away. But instead of being buried in land, some feathers could find a future in plastics . One of the products they have developed is a flowerpot . It may look like other flowerpots. But the container breaks down in the earth within one to five years. And as it _ , it naturally becomes nutrient in the soil. The environmentally friendly flowerpot is the work of two researchers. Walter Schmidt is with the Agricultural Research Service, part of the United States Agriculture Department. Masud Huda is with the Horticultural Research Institute, a private organization . Walter Schmidt has been working to find uses for chicken feathers since the 1990s. Progress in 2002 showed that plastic made from feathers could be formed like other plastics. He says feathers are much stronger and last longer than another plant material. "Feathers are stronger. By design, feathers are also more durable . And the other part about it is if feathers were twice as heavy, or half as strong, then birds couldn't fly." He points out that traditional flowerpots made from other plastics can last much longer. But he wonders if there is really a need. He says most flowerpots are never re-used. "Why would you want a plastic that you use for a year to last for two hundred years? It makes no sense. You want to match the product with the use." said Walter Schmidt. Walter Schmidt and Masud Huda are now adding another chicken product to their flowerpots -- chicken waste. The waste will add more nutrients to the soil as the pot breaks down. The scientists say they hope their flowerpot will be on the market in a year or two. Options: A Feathers are used to make pillows, coats and other products. B Most feathers are paid no attention to. C Most feathers are used as nutrient D Most feathers are used to make flowerpots Answer: B Most feathers are paid no attention to. Question:
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The answer is:
What do people mainly deal with feathers?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Liu Qian, a magician from Taiwan, cast his spell over an audience of thousands on the CCTV Spring Festival Show. Die-hard fans are still trying to work out the secrets behind many of the tricks he performed. But Liu, 32, when asked, laughed off the idea that there might be an "answer" to his magic. "The most fascinating things about magic is the puzzling process. People enjoy how magicians make the impossible come true," said Liu. Few people today believe in the possibility of real magic. They also often fail to consider magicians' devotion to their art. It can take a magician years' of practice to perfect a trick before he performs it on stage. Part of Liu's star appeal is his astonishing skill. However, when he began in the industry, he was embarrassingly clumsy. "I could practice thousands of times for one single act. It wasn't much fun," he said. No magician's supernatural powers on stage extend to their life off stage. Liu says his life was no easier or funnier because he was a magician. He developed an interest in magic at a young age, but didn't consider making a living out of it until he graduated from university. He had studied Japanese language and found himself unable to find a job. "My parents never considered being a magician as a proper job. To begin with, I had little confidence I would be doing this in the long term," he said. Yet Liu felt a powerful calling to become a magician. "For many people, magic somehow means a miracle, which is something we all secretly wish for no matter how hard-bitten or cynical we become," he said. Liu may be right. A popular modern dream is of the fairy godmother, who waves her magic wand and makes our dreams come true. But according to Liu, we all have the power to create magic in our lives. As Liu puts it: it's not the magic that makes it work;it's the way we work that makes it magic. Options: A Liu Qian is a born magician B Liu Qian studied magic at university. C Liu Qian became successful mainly because he was hard-working. D Godmother helped him. Answer: C Liu Qian became successful mainly because he was hard-working. Question:???
output answer: Which of the following is true according to the passage?

Please answer this: Write a multi-choice question for the following article, with the given choices and answer: Article: Recent research has claimed that an excess of positive ions in the air can have an ill effect on people's physical or psychological health. What are positive ions? Well, the air is full of ions, electrically charged particles, and generally there is a rough balance between the positive and the negative charged. But sometimes this balance becomes disturbed and a larger proportion of positive ions are found. This happens naturally before thunderstorm, earthquakes when winds are blowing in certain countries. Or it can be caused by a build-up of static electricity indoors from carpets or clothing, or from TV sets, duplicators or computer display screens. When a large number of positive ions are present in the air many people experience unpleasant effects such as headaches, fatigue , excessive anger, and some particularly sensitive people feel sick or even suffer mental disturbance. Animals are also affected, particularly before earthquakes, snakes have been observed to come out, rats to flee from their burrows, dogs howl and cats jump about unaccountably. This has led the US Geographical Survey to fund a network of volunteers to watch animals in an effort to foresee such disasters before they hit vulnerable areas such as California. Conversely, when large numbers of negative ions are present, then people have a feeling of well-being. Natural conditions that produce these large amounts are near the sea, close to waterfalls or fountains, or in any place where water is sprayed, or forms a spray. This probably accounts for the beneficial effect of a holiday by the sea, or in the mountains with streams or waterfalls. To increase the supply of negative ions indoors, some scientists recommend the use of ionisers. They claim that ionisers not only clean and refresh the air but also improve the health of people sensitive to excess positive ions. Of course, there are the detractors, other scientists, who dismiss such claims and are skeptical about negative/positive ion research. Therefore people can only make up their own... Options: A It's a charged particle. B It's basically static electricity indoors. C It's a balance between the positive and negative charged. D It's an ill effect on people's physical and psychological health. Answer: A It's a charged particle. Question:
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Answer:
What is an ion according to the passage?