input question: Write a multi-choice question for the following article: Article: Below is a selection from a popular science book. If blood is red, why are veins blue? Actually, veins are not blue at all. They are more of a clear, yellowish colour. Although blood looks red when it's outside the body, when it's sitting in a vein near the surface of the skin, it's more of a dark reddish purple colour. At the right depth, these blood-filled veins reflect less red light than the surrounding skin, making them look blue by comparison. Which works harder, your heart or your brain? This question depends on whether you're busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker. But, in the long run, your brain probably tips it, because even when you're sitting still your brain is using twice as much energy as your heart, and it takes four to five times as much blood to feed it. Do old people shrink as they age? Yes and no. Many people do get shorter as they age. But, when they do, it isn't because they're shrinking all over. They simply lose height as their spine becomes shorter and more curved due to disuse and the effects of gravity . Many (but not all) men and women do lose height as they get older. Men lose an average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again?No, because old people don't really shrink!It is not that they are growing backwards--their legs, arms and backbones getting shorter. When they do get shorter, it's because the spine has shortened a little. Or, more often, become more bent and curved. Why does spinning make you dizzy ? Because your brain gets confused between what you're seeing and what you're feeling. The brain senses that you're spinning using special gravity and motion sensing organs in your inner ear, which work together with your eyes to keep your vision and balance stable. But when you suddenly stop spinning , the system goes out...???
output answer: Question: Why do some old people look a little shrunken as they age?Options:A Their spine is in active use.B They are more easily affected by gravity.C They keep growing backwards.D Their spine becomes more bent.Answer:D

input question: Write a multi-choice question for the following article: Article: South Africa hosted the fifth BRICS Summit in March 2013,which completed the first cycle of BRICS summits,BRICS is an acronym for the powerful grouping of the world's leading up-and-coming economies,namely Brazil,Russia,India,China and South Africa.The BRICS aims to achieve peace,security,development and cooperation.It also seeks to contribute to the development of humanity and build a more stable and fairer world. The industry leaders from the business communities of the five countries agreed that the BRICS countries will actively support industrialization on the African continent in order to contribute significantly to its development and to expand trade links between Africa and BRICS.The global economic situation,though improving,continues to remain uncertain with the Euro-crisis a major concern.The task ahead is to build on these developments and BRICS countries remain committed to the cause of promoting sustainable growth.Greater economic cooperation among BRICS countries can be significantly important,which will prove beneficial for global economic growth. According to Dr.Rob Davies,South African Minister of Trade and Industry,the African continent is recognized as the second fastest growing continent after Asia.There are four drivers of the economic growth in African continent.These are the boom in mineral products in the African continent,the development of the service industries,the benefit of not having the financial crisis,and infrastructure development.Davies also adds that other BRICS countries have advantage of large populations providing big home markets for their products.The South African population is small compared to other BRICS countries,but if you add up numbers on continent then you have a critical mass that can support the new industrial wave in Africa:That is why the South African needs to create large trading blocks across large parts of African continent.???
output answer: Question: "BRICS" refers to _ .Options:A the most active economy group in today's worldB the most powerful economies in western worldC leading countries with fast development of humanityD the most stable and secure countries in the worldAnswer:A

input question: Write a multi-choice question for the following article: Article: A pet parrot that spoke with a British accent when it disappeared from its home four years ago has been reunited with its owner ---- and the bird now speaks Spanish. The reunion was brought about by Teresa Micco, a Southern California veterinarian who mistook Nigel, an African gray parrot, for her own missing bird, the Daily Breeze reported on Sunday. Teresa Micco tracked Nigel's microchip to Darren Chick, a British man who lives in Torrance, California. "I introduced myself and said, 'Have you lost a bird?' "Micco told the newspaper. "He first said, 'No' But he thought I meant recently " When she checked on Chick's name and said she had his African gray parrot, "He looked at me like I was crazy. " He said his bird had gone missing for four years earlier. Little is known about Nigel's whereabouts for the past four years, but Chick says the bird's British accent is gone, and it now chatters in Spanish. Chick says last week's reunion brought tears of joy to his eyes---despite the fact that Nigel bit him when he first tried to pick him up. Micco said the behaviour was not unusual and that Nigel would settle back in soon enough. "He is doing very well," Chick told the newspaper. "It is really strange. I knew it was him from the minute I saw him" It is the fifth parrot reunion helped by Micco, who has been running advertisements for her own missing bird for nine months. That parrot, Benjamin, escaped in February when it flew out through a door that had been left open. Julissa Sperling found Nigel outside her home and brought him to Micco after seeing one of her advertisements. "He was the happiest bird. He was singing and talking all the time," Sperling said. "He was barking like my dogs. I am from Panama, and he was saying, 'What happened?' in Spanish."???
output answer:
Question: What is the main idea of the text?Options:A A man finds that his bird can speak SpanishB A parrot missing for years returns speaking SpanishC Teresa Micco helps many people find their missing petsD Kindness and love are passed on through a parrot.Answer:B