Problem: Write a multi-choice question for the following article, with the given choices and answer: Article: WASHINGTON--Two-thirds of the world's polar bear population could be gone by 2050 if predictions of melting sea ice hold true, the US Geological Survey reported on Friday. The fate of polar bears could be even worse than that estimate, because sea ice in the Arctic might be disappearing faster than the available computer models predict, the geological survey said in a report aimed at determining whether the big white bear should be listed as a threatened species. "There is a definite link between changes in the sea ice and the welfare of polar bears," said Steve Amstrup, who led the research team. He says Arctic sea ice is already at the lowest this year and is expected to retreat farther this month. That means that polar bears--some 16,000 of them -- will disappear by 2050 from parts of the Arctic where sea ice is melting most rapidly, along the north coasts of Alaska and Russia, researchers said in a telephone briefing . Other polar bears could survive beyond that date but many of those could be gone by 2100, Amstrup said. By this century's end, the only polar bears left might live in the Canadian Arctic islands and along the west coast of Greenland. "It is likely to result in loss of approximately two-thirds of the world's current polar bear population by the mid 21st century," the report's executive summary said. "Because the observed trajectory of Arctic sea ice decline appears to be underestimated by currently available models, this assessment of future polar bear status may be conservative ." In January, the US Fish and Wildlife Service proposed listing the polar bear as a threatened species, noting polar bears depend on sea ice as a platform to hunt seals, their main food. Without enough sea ice, polar bears would be forced onto land, but they are poor hunters once they get out of the water and ice, the researchers said. The bears' disappearance would probably take place as young cubs failed to survive to adulthood and females were unable to reproduce successfully. Options: A To determine whether the polar bear was in danger. B To measure how fast the sea ice melts in the Arctic. C To check the predictions of the computer models. D To find out the exact number of the polar bear. Answer: A To determine whether the polar bear was in danger. Question:

A: What was the US Geological Survey intended to do?

Problem: Write a multi-choice question for the following article, with the given choices and answer: 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... Options: A red-striped shield is the best thing to use in advertising B main streets and television are used in advertising C person-to-person selling is the best way in advertising D people show little interest in advertisement Answer: B main streets and television are used in advertising Question:

A: We can conclude from the passage that_.

Problem: Write a multi-choice question for the following article, with the given choices and answer: Article: Perhaps you have seen them on the playground, at preschool drop-off or piano lessons, or even in TV shows like Up All Night. They are the stay-at-home dads, and lately, it seems they're everywhere. The latest research shows that 32 percent of dads regularly care for their children, and among those with preschool-age kids, one in five dads is the primary caregiver. In families where mom works, that figure rises to nearly one in three. Stay-at-home dads have become so common that even toy makers like Mattel are catering to them. A recent study finds that today's full-time fathers aren't trying to be "Mr. Moms". Instead, they're carving out their own unique roles as parents. I spoke with some experienced stay-at-home dads, who agreed that their parenting styles are different. "I do let the kids take more risks on the playground, while my wife tends to get nervous that they'll fall and hurt themselves," says Kyle, 38, an artist. Besides, as there are more and more stay-at-home dads, they are turning to each other for support. They have created Meet Up groups and held Dads Nights Out. Kyle admits he had noticed a change recently. "Several years ago, I was checking out at a store with the kids, and the cashier was very curious why I was buying food instead of my wife. I told her that I was a full-time dad, and she commented, 'Wow, I have never met one of you before.' Now, my next-door neighbor is a dad who works from home and we often trades off watching the kids after school. " As for my own husband, although he admits that being a full-time dad is encouraging, he's also proud of the strong bond with our daughter, which will offer her benefits that last for years. Children wit caring dads tend to have higher intelligence and more confidence, and do better in school. They also are less likely to experience depression or get into trouble, and have better social skills. Options: A The founding of Meet Up groups. B The change of people's attitude towards them. C The increase in the number of stay-at-home dads. D The development of new communication methods. Answer: C The increase in the number of stay-at-home dads. Question:

A:
What change has Kyle noticed recently?