input question: Write a multi-choice question for the following article, with the given choices and answer: Article: You may have never heard of Lanthanum, Cerium or Neodymium, but these elements and others known as "rare earth" play a major role in modern technology. They can actually be found in many places on the earth, but not in quantities that can be mined. Only a few countries -- China, America, India, Australia, Brazil and Malaysia have any that can be mined enough to be traded. Even though some of these elements such as Cerium are as abundant as Copper, they are not found in concentrated amounts on the earth's surface. They are often mixed together with other metals, which makes extraction of these elements an expensive and an environmentally messy process. It was due to this reason that the term "rare earth" was invented. Rare earth metals are used widely in our life. Rechargeable car batteries, computers, iPhones, DVD players, computer monitors, televisions, lighting, lasers, glass polishing, and superconductors all use quantities of rare earth metals. Also, with the advancement in "green" technology like solar panels, these shiny materials are becoming more important than ever. An average electric car uses 10 pounds of Lanthanum for its rechargeable battery! America has large deposits of rare earths and has one of the first mines. It was opened in Southern California in 1940. The element "Europium" was the first metal to be separated in quantity for use in color televisions. However, in the 1980's and 1990's, as China started producing these elements in Inner Mongolia, the mines in America and elsewhere could not keep pace. The mine in Mountain Pass, California also failed environmental regulations and shut down in 2002. Now, recognizing the importance of having more than one supplier of this important resource, other rare earth owning countries like India and Australia are either dusting off their rare earth mines or speeding up their production. It is believed that the debate over rare earths will become louder in the coming months and years. Options: A They are actually as abundant as Copper. B They can be mined easily as other metals. C They can only be found in a few countries. D They are not really as rare as they are named. Answer: D They are not really as rare as they are named. Question:???
output answer: What can we learn about rare earths?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Electrical devices could soon use power make by human energy, Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking , British scientist Max Donelan and other scientists in Canada and the United States developed the device. The device connects to a person's knee, As the person walks, the device captures energy each time the person slows down, To do this ,the device helps with the slowing sown movement of the leg, The movements of the walking person push parts of a small machine that produces electricity, Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute, Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes. There are several possible uses for the device ,Developers say it could help people who work in areas without electricity to operate small computers, The deice could also be used in hospitals to operate heart pacemakers ,It could even be used to assist in the movement of robotic arms and legs. The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy, But the researchers hope to make a lighter, less costly version.An improved version should be ready in one year. The developers hope the device will one day help developing countries, Nearly twenty five percent of people around the world live without electric power. A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania,He created a bag carried on a person's back that also produces power from walking, The knee device does not produce as much electricity as the bag ,But the bag requires the walker to carry a load of twenty to thirty kilograms. Options: A First device powered by walking will soon be on the market B Advanced technology brings in a new way to operate heart pacemakers C Device gives new meaning to the idea of power walking D Human energy will become a main source of electricity Answer: C Device gives new meaning to the idea of power walking Question:???
output answer: What would be the best title for the passage?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: You can't hide a natural disaster from children, so how do we prepare them for it? First of all, you should explain to them that acts of nature aren't necessarily disasters but can become one. These may include floods, hurricanes, tornadoes, winter storms, wild fires, and earthquakes. The way to prepare children for these disasters is to educate them about what each type is and then make it fun by making them "Disaster Masters" or whatever title you can think of. Making them a Disaster Master won't be easy. They must know what's in a disaster emergency kit and why it's included. You can get your friends involved, too. If your friends have children, they may want to be involved in your emergency preparations. Make it a group project. This is the opportunity for everyone to become familiar with the equipment. We have to be aware of our conduct and the way we react to stress. The children will be easily influenced by your attitude and _ . The calmness, steady manner, and good humor of your spouse and you will go a long way toward the easing or the reduction of stress. Explain to them what they're likely to encounter or see and describe how people may react. Disasters can come and go very quickly and generally don't last long. If you must stay away from home, try to get into a routine quickly and encourage them to make new friends. Let them know they can look to their parents and other adults if they become scared or confused. And it's important to let them know it's OK to cry during a disaster. It's sometimes helpful to let the children draw pictures of what they've experienced. Encourage them to write what they learned and what could have been done better. Save the story. Make it part of a documented family history! Options: A parents B young children C teachers D college students Answer: A parents Question:???
output answer:
The author wrote the passage mainly for _ .