Write a multi-choice question for the following article, with the given choices and answer: Article: Most people know precious gemstones by their appearances. An emerald flashes deep green, a ruby seems to hold a red fire inside, and a diamond shines like a star. It's more difficult to tell where the gem was mined, since a diamond from Australia or Arkansas may appear the same to one from the Democratic Republic of the Congo. However, recently, a team of scientists has found a way to identify a gemstone's origin. Beneath the surface of a gemstone, on the tiny level of atoms and molecules , lie clues to its origin. At this year's meeting of the Geological Society of America in Minneapolis, Catherine McManus reported on a technique that uses lasers to clarify these clues and identify a stone's homeland. McManus directs scientific research at Materialytics, in Killeen, Texas. The company is developing the technique. "With enough data, we could identify which country, which mining place, even the individual mine a gemstone comes from," McManus told Science News. Some gemstones, including many diamonds, come from war-torn countries. Sales of those "blood minerals" may encourage violent civil wars where innocent people are injured or killed. In an effort to reduce the trade in blood minerals, the U.S. government passed law in July 2010 that requires companies that sell gemstones to determine the origins of their stones. To figure out where gemstones come from, McManus and her team focus a powerful laser on a small sample of the gemstone. The technique is called laser-induced breakdown spectroscopy. Just as heat can turn ice into water or water into steam, energy from the laser changes the state of matter of the stone. The laser changes a miniscule part of the gemstone into plasma, a gas state of matter in which tiny particles called electrons separate from atoms. The plasma, which is superhot, produces a light pattern. (The science of analyzing this kind of light pattern is called spectroscopy.) Different elements produce different patterns, but McManus and her team say that gemstones from the same area... Options: A Heat can turn ice into water or water into steam. B Gemstones from the same area produce similar light patterns. C Laser can changes a miniscule part of the gemstone into plasma. D Materialytics has already collected patterns from thousands of gemstones. Answer: B Gemstones from the same area produce similar light patterns. Question:
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Answer: Which of the following facts most probably helps McManus and her team in identifying the origin of stones?

Q: Write a multi-choice question for the following article, with the given choices and answer: Article: For 40 years, people in London have been happy to see parakeets in their parks. The shocking green body and long tail have brought a bright color to the parks, which have attracted a lot of people. However, the parakeets are no longer welcome. They will push out local birds from trees to build their own nests, and will also take most of the food in the parks, such as seeds, fruit and nuts. Sometimes by accident, plants and animals are carried to new places. They are transported by trains, ships or even planes. Often, animals like fishes get transported in the water containers of ships. When these ships reach new places and pump out the water from their tanks, these animals will start a new life in a new place. Sometimes people take plants and animals from one part of the world to the other to solve a problem. But it will create a bigger problem. Years ago, the farmers of northern Australia brought the toads from South America to their farms. They thought they would kill the beetles that harm the sugarcane crops. But the toad has done much more. It is now killing Australia's native animals, such as snakes, water birds and so on. Options: A their appearance B their singing C their behavior D their living environment Answer: A their appearance Question:
A: People get interested in parakeets mainly because of _ .

Question: Write a multi-choice question for the following article, with the given choices and answer: Article: The use of lotteries to allocate school places is to be reviewed by the British government because more than 20 percent of children are failing to get into their first-choice schools in parts of the country. The struggle for secondary school places has reached record levels this year, increasing anxiety for hundreds of thousands of families. A report from 43 local authorities suggests that in many areas, up to a fifth of children face disappointment. Families in London are the hardest hit. This week is admissions week, when about 570,000 families will receive notice about their child's secondary school acceptance. As the recession forces more parents to consider a state education rather than a private one for their children, more than a third of local authorities have noted rises in the number of applications for secondary school places. This year, just 62 percent of children in Richmond-upon-Thames got into their parents' first-choice school, down from 64 percent last year. The council said this was caused by an increase in applications. In another London authority, Tower Hamlet, 71.1 percent of children were admitted to their parents' first choice school. In Leeds and Warwickshire, 85 percent were successful. In Derby the figure was 81 percent, while in Wiltshire, Stockport and Lincolnshire, the figure was 89 percent. In many authorities, the figures are similar to those of last year. Exceptions include Brighton and Hove, which introduced a lottery system to allocate oversubscribed places last year. This year, it has seen a 3.5 percent increase in the number of children obtaining their first choice, bringing the total to nearly 88 percent. However, more than 5 percent of children in this area have been allocated a place at a school that was not among any of their choices. Lotteries are being used at the government's suggestion by a small number of oversubscribed schools in around twenty-five local authorities. They were meant to prevent middle-class parents from abusing the system by buying or renting... Options: A keep middle-class parents buying or renting homes close to the best schools. B increase the number of children obtaining their first choice C decrease the number of applications for some good schools D create equality between children from different social classes Answer: D create equality between children from different social classes Question:
Answer: The purpose of using lottery system is to _ .

Write a multi-choice question for the following article, with the given choices and answer: Article: At present time, roller skating is easy and fun. But many years ago, it wasn't easy at all. Before 1750, people never tried skating on wheels. That changed because of a man named Joseph Merlin. Merlin's work was making instruments . In his free time he liked to play the violin. Merlin was a man with many ideas and many dreams. People called him a dreamer. One day Merlin received an invitation to go to an important party. He was very pleased and a little excited. As the day of the party came near, Merlin began to think. He wanted to find a way to make a wonderful entrance at the party. Merlin had an idea. He thought that he would attract a lot of attention if he could skate into the room. Merlin tried different ways to make himself roll . Finally, he decided to put two wheels under each shoe. These were the first roller skate shoes. Merlin was very proud of them. He dreamed of arriving at the party and skating into the room while playing the violin. He was sure that everyone would be very surprised. On the night of the party Merlin rolled into the room, playing his violin. Everyone was really surprised to see him. There was just one problem. Merlin had no way to stop his roller skating. He rolled on, playing the violin. Then, with all eyes on him, Merlin hit into a huge mirror on the wall. The mirror broke into many pieces with a very loud noise. Nobody forgot Merlin's wonderful entrance after that. Options: A he slept and dreamed a lot B he was full of different ideas and dreams C he invented the first roller skates D he always made people's dreams come true Answer: B he was full of different ideas and dreams Question:
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Answer:
People called Merlin a dreamer because _ . .