Problem: Write a multi-choice question for the following article: Article: This story breaks my heart every time. Just two years after the discovery of tanzanite in 1967, a Maasai tribesman knocked on the door of a gem cutter's office in Nairobi. The Maasai had brought along an enormous block of tanzanite and he was looking to sell. His asking price? Fifty dollars. But the gem cutter assumed that a stone so large could only be glass and refused. It turned out that the gem was genuine and could have been worth close to $3,000,000! The gem cutter missed his chance to hit the jeweler's jackpot and make history. Would you have made the same mistake then? Will you make it today? In the decades since its discovery, tanzanite has become one of the world's most precious gemstones. Found in only one remote place on the Earth (in Tanzania's Merelani Hills), the precious purple stone is 1,000 times rarer than diamonds. Luxury retailers have been warning that supplies of tanzanite will not last forever. And in this case, they're right. Once the last purple gem is pulled from the Earth, that's it. No more tanzanite. Most believe that we only have a few years' supply left, which is why it's so amazing for us to offer this incredible price break. Our 2-carat Tanzanite Ring is a real bargain! This is a ring designed to impress and it does not disappoint. Now is the point where opportunity knocks, much like a Maasai tribesman on your office door. If you open that door today, you can own this excellent ring for less than $100. If you wait? We can't say for sure. Because when it comes to Africa's most prized purple stone, only one thing is certain: _ . Call now to take advantage of this limited offer. 1-888 201-7112

A: Question: The gem cutter didn't buy the stone because _ .Options:A he couldn't afford to pay for itB he doubted whether it was genuineC the Maasai tribesman charged too muchD the stone was small and of poor qualityAnswer:B

Problem: Write a multi-choice question for the following article: Article: A breathtaking trick potentially left over from our ancestors might be found in us -- the ability to sense oxygen through our skin. Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo. Now the same oxygen sensors found in frog skins and in the lungs of mammals have unexpectedly been discovered in the skin of mice. "No one had ever looked," explained Randall Johnson, a biologist researcher. Mice and frogs are quite distant relatives, so the fact they have these molecules in common in their skin suggests they might well be found in the skin of other mammals, such as humans. "We have no reason to think that they are not in the skin of people too," Johnson said. These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen--a dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone even after hours of such low oxygen. These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia without injecting drugs, which make up a multibillion-dollar market, Johnson said. Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. "It's hard to say what exactly might be done, however--there's a lot we don't know yet," Johnson explained. The scientists...

A: Question: What is Johnson's attitude to the application of the findings to the athletes' training?Options:A HesitatingB DoubtingC PositiveD NegativeAnswer:C

Problem: Write a multi-choice question for the following article: Article: As a boy, Mark Twain caused much trouble for his parents. He used to play practical jokes on all his friends and neighbors. The nature of his jokes often led to violence . He hated to go to school and he constantly ran away from home. He always went in the direction of the nearby Mississippi. He liked to sit on the bank of the river for hours at a time and just gaze at the mysterious island and the passing boats. He learned many things about the river during those days. He learned all about its history and unusual people. He later made them part of the history of America in the book Tom Sawyer and Huckleberry Finn. Mark Twain received his genius from his mother. Obviously he didn't get it from his father. He once stated that he had never seen a smile on his father's face. On the other hand, his mother had the ability to say humorous things. The same ability made Mark Twain an extremely humorous public speaker.

A: Question: According to the passage, Mark Twain was a _ boy.Options:A shyB braveC naughtyD poorAnswer:C

Problem: Write a multi-choice question for the following article: Article: Advertisement is the difficult business of bringing information to great numbers of people.The purpose of an advertisement is to make people respond to make them react to an idea,such as helping prevent forest fires,or to make them want to buy a certain product or service.At the beginning of the 20th century,advertisement was described as"salesmanship in print".If this definition were expanded to include radio and television,it would still stand today.The most effective way to sell something is through person-to-person contact.But the cost of person-to-person selling is high because it takes a great deal of time,and it increases the cost of the product or service.Advertising distributes the selling message to many people at one time.The first printed advertisement in the English language appeared in 1278,more than a century before Shakespeare's first play was produced.This early advertisement was the work of William Caxton,England's first printer,who used it to advertise religious books from his own workshop Caxton posted small printed notices along London's main streets.Besides advertising his product,he identified his shop with a red-striped shield so that customers could find it easily. This same sort of simple informational advertising is still used.Examples are the roadside signs that tell travelers that they can buy fresh corn just down the road or that there is a restaurant in the next town. The Industrial Revolution,in the 18th and 19th centuries,brought a new kind of advertising.Large factories took the place of small workshops and goods were produced in large quantities. Manufacturers used the newly built railroads to distribute their products over wide areas.They had to find many thousands of customers in order to stay in business.They couldn't simply tell people where shoes or cloth or tea could be bought---they had to learn how to make people want to buy a specific product. Thus modern advertising was born. Advertising created new markets and helped to raise standards of living as people came to...

A:
Question: We can conclude from the passage that_.Options:A red-striped shield is the best thing to use in advertisingB main streets and television are used in advertisingC person-to-person selling is the best way in advertisingD people show little interest in advertisementAnswer:B