input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Napping after learning something new could help improve your memory...as long as you dream, scientists say. They found people who dream about a new task do it better on waking than those who do not sleep or do not dream. Volunteers were asked to learn the layout of a 3D computer maze so they could find their way several hours later. Those allowed to take a nap and who also remembered dreaming of the task, found their way to a landmark quicker. The researchers think the dreams are a sign that unconscious parts of the brain are working hard to process information about the task. Dr. Robert Stickgold of Harvard Medical School, said dreams may be a marker that the brain is working on the same problem at many levels. Study tips Co-author Dr. Erin Wamsley said the study suggests our non-conscious brain works on the things that it deem are the most important. "Every day we are gathering lots of information and new experiences," she said. "It would seem that our dreams are asking the question, "How do I use this information to inform my life?" The scientists say there may be ways to use this phenomenon for improving learning and memory. For example, students might be better studying hard before bedtime, or taking a nap after a period of afternoon study. Options: A dream B nap C nap and dream D nap without dream Answer: C nap and dream Question:???
output answer: Scientists say _ could help improve your memory.

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Accidents often happen. It's necessary for us to remember these tips. On your way home or to school: Wait for the green traffic light, and look left and right before you cross the road. If you see a car coming, don't cross until it really stops. At school: Never run around too fast at school. When students around you begin to push, try to hold something. If you fall down in a crowed place, cover your head with both hands. When there's a fire: Keep quiet and leave quickly. Use a piece of wet cloth to cover your mouth and nose so that you don't breathe in smoke. If your clothes catch fire, drop to the ground and roll from side to side to put out the fire. For eating: Wash fruit like apples or pears carefully before you eat it. And if your food looks or smells bad, don't eat it. About strange invitations: If an Internet friend asks to meet you, tell your parents about it. Don't go alone. Options: A Parents. B Patients. C Teachers. D Students. Answer: D Students. Question:???
output answer: Who do you think the passage should be for?

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Once there was a huge apple tree.A little boy loved to come and play around it every day.He loved the tree and the tree loved to play with him. Time went by---the little boy had grown up and he no longer played around the tree every day.One day, the boy came back to the tree and he looked sad."Come and play with me, " the tree asked the boy."I'm no longer a kid.I wouldn't play around the tree any more." the boy replied."I want toys.I need money to buy them." "Sorry, I don't have money.But you can pick all my apples and sell them.So, you will have money." The boy picked all the apples on the tree and left happily.The boy never came back after he picked the apples. One day, the boy returned and the tree was so excited, "Come and play with me, " the tree said."I don't have time to play.I have to work for my family.We need a house for shelter.Can you help? " "Sorry, I don't have a house.But you can cut off my branches to build your house." So the boy cut all the branches off the tree and left happily.The tree was glad to see him happy but the boy never came back since then.The tree was again lonely and sad. One hot summer day, the boy returned and the tree was pleased."Come and play with me! " the tree said."I am sad and getting old.I want to go sailing to relax myself.Can you give me a boat? " "Use my trunk to build your boat.You can sail far away and be happy." So the boy cut the tree trunk to make a boat.He went sailing and never showed up for a long time. Finally, the boy returned after he left for so many years."Sorry, my boy.But I don't have anything for you any more.The only thing left is my dying root, " the tree said with tears 1 "Good! Old tree root is the best place to lean on and rest.Come and sit down with me and rest." The boy sat down and the tree was glad and smiled with tears 2 Options: A to have a house to live in B nothing except a place to rest C the root of the apple tree D anything that the apple tree had Answer: B nothing except a place to rest Question:???
output answer: At last the boy wanted _ .

input question: Write a multi-choice question for the following article, with the given choices and answer: Article: America is the world's largest food exporter . But the worst drought in half a century is hitting corn and wheat harvests. By twenty-fifty, the world will have to produce at least sixty percent more food to feed more and more people. China, a major food importer , is looking to producers around the world to make sure it can get enough food in the future. The serious drought in the United States is adding to care about world food and prices. China has invested in food production in Australia and New Zealand. A new source of food is Ukraine. Ukraine was known as the breadbasket of Europe because of rich corn and wheat harvests a century ago. Galyna Kovtok is chief manager of Ukraine's largest agricultural business, ULF. She says that within a few months her company will export corn to China. That will make Ukraine the first country outside the Americas to do so. Across the Black Sea area -- in Ukraine, Russia and Kazakhstan -- drought this year is pushing harvests down by fifteen to twenty percent. Traditionally, the Black Sea area is the main source of wheat for North Africa and the Middle East. But this year, Russia may have to _ exports. However, Africa and the Middle East are now having competition with China. Options: A make sure of getting its future food B help the poor people there C build up a good relationship with Ukraine D have competition with Africa and the Middle East Answer: A make sure of getting its future food Question:???
output answer:
China is investing in Ukraine mainly to _ .