input question: Write a multi-choice question for the following article, with the given choices and answer: Article: Most people watching Jeremy Lin these past two months saw Jeremy Lin, New York Knicks star; but I, watching him, saw someone else. That was my elder brother, Bob, who is athletic and energetic. He could never sit still when he was in second grade; he had to get up every now and then and run around the room. And sure enough, he grew up to be a starting player for an N.C.A.A. championship lacrosse team. He was a Nike-endorsed marathoner, too, and reached the top of Mt. Everest, unguided, in his 50s. And yet my family never watched his lacrosse games. We did watch some of his marathons, but that wasn't until he was in his 20s. When Bob was in his glory days, our Shanghainese-born parents were bent on getting him into medical school. There was a loving aspect to it: I can remember my father working through math books with him, lesson by lesson, at the big blackboard in the attic. Bob never did become a doctor, though; and neither did I. It wasn't until my younger sister came along that someone in the family finally wore a white coat. Bob today could be the fittest 58-year-old on the planet. His doctor estimates his biological age at 35; he's still climbing big mountains in the Himalayas. And, like Jeremy Lin, he's charming. No one sees Bob without leaving with a laugh. He sometimes jokes he could be mayor of his building, and it's true. To know him is to cheer for him. And yet my parents did not cheer for him. What if my mother had sat on the sidelines with her statistics, like Jeremy Lin's mother? What if my father had played videos of athletes for my brother to watch and imitate? It's hard not to wonder. And how did Jeremy Lin's parents manage to do these remarkable things? Amy Chua, the tiger mother, recalls her immigrant father beating the kids whenever they mispronounced a Chinese word. How is it that Jeremy Lin's immigrant father in particular, Gie-Ming Lin, encouraged his son to follow such an untraditional path? Options: A when he was doing well in math B when he was in second grade C when he was made mayor of his building D when he showed his talents in sports Answer: D when he showed his talents in sports Question:???
output answer: Bob's glory days were those _ .

Write a multi-choice question for the following article, with the given choices and answer: Article: Many Americans concerned about pollution are demanding cleaner supplies of energy. The demand has resulted in increased research about ethanol fuel. Ethanol is an alcohol that can be mixed with gas. It burns up most of the pollutants in gas. It replaces some of the chemicals that are known to cause cancer, and it can be produced in the United States. Some experts say that in the future ethanol will replace some of the oil imported into America. Today ethanol is less than one percent of total American fuel supply. The head of the National Corn Growers Association, Kieve Hard, says ethanol will provide twenty-five percent of the fuel supply by 2030. The organization is involved in the production of ethanol because it can be made from corn. One company in the American Midwest says it is starting to produce ethanol because of demands from people and from the government. The Congress approved the Clean Air Act in 1990. The company says this means the market for ethanol will expand. The company is a major producer of corn starch that can be used to make ethanol. At Texas A and M University Professor Mark Holzapple produces ethanol from materials found in solid waste. He has developed a way to turn materials like paper into simple sugar. He then uses yeast to turn the sugar into ethanol. Professor Holzapple says two hundred liters of ethanol fuel can be produced from one ton of solid waste. A professor at the University of Arkansas, John Geddie, is exploring another way to make ethanol. He is using acids on paper material. He says a large factory could produce ethanol from waste paper at a cost about the same as the cost of producing gasoline. Environmentalists support the use of ethanol because it turns solid waste into a useful product. Professor Holzapple says law makers in industrial nations need to support the development of this clean, less expensive fuel of the future. Options: A It needs the cooperation of many chemists. B It associates with the use of advanced equipment. C It will improve the use of heat from exhaust gases. D It requires the support of the government. Answer: D It requires the support of the government. Question:
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Answer: What does Professor Mark Holzapple think of the development of ethanol in countries?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: Fruit powered digital clock Fruit's not only good to eat, but it can also power this Fruit digital Clock. This clock uses the scientific principles on which modern electrical storage batteries are based. The acid from the fruit helps transmit an electrical flow between two metal poles. The clock is priced at US $ 15. Connecting any fresh fruit or vegetable to the clock will make it work. The fruit is a clean, renewable source of electrical power. USB vacuum Do you know the dirtiest parts of your desk are probably your keyboard and mouse? Get a USB Mini Vacuum with retractable cable and suck away all that _ . The US- made product is priced at US $14. SIM card reader Making useful USB 2.0 multi-card readers even handier, this card can also read and write data to phone SIM cards. It comes with SIM editing software. Download your phonebook to your computer. If you lose your cell phone, you can store missing phone numbers in your new one. The US-made IMOMO SIM card + Multi Card Reader is priced at US $ 19 (152yuan). Beer in your ear The beer barrel -shaped Naf Naf Hyp MP3 is a musical box that's capable of playing radio, CDs and cassettes. It's got all the standard features of the typical clock-radio, but with the relaxing look of a big beer barrel. The Danish product is priced at about US $ 130 (1,040yuan) Options: A dirt B desk C keyboard D mouse Answer: A dirt Question:
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The answer is:
What does "junk" mean in the second item?