Write a multi-choice question for the following article, with the given choices and answer: Article: A study made by University of Sussex found that men and women who frequently used several types of technology at the same time had less grey matter in a key part of the brain . The researchers said : " Simultaneously , using mobile phones , laptops and other media devices could change the structure of our brains . " Worryingly , the part of the brain that shrinks is involved in processing emotion . The finding has linked multi-tasking with a shortened attention span , depression , anxiety and lower grades at school . The researchers began by asking 75 healthy men and women how often they divided their attention between different types of technology . This could mean sending a text message while listening to music and checking email , or speaking on the phone while watching TV and surfing the web . The volunteers were then given brain scans which showed they had less grey matter in a region called the anterior cingulated cortex ( ACC ) . The findings held even when differences in personality were taken into account . The study , published in the journal PLOS ONE , is the first to make a link between multi-tasking and the structure of the brain . Researcher KepKeeLoh said : " Media multi-tasking is become more popular in our lives today and there is growing concern about its impacts on our cognition and social-emotional well-being . " He added that more researches are needed to prove that multi-tasking shrinks the brain . This is because it is also possible that people with less grey matter in the ACC are more likely to use lots of devices simultaneously . Scientists have previously described brain structure can be altered on prolonged exposure to new environments and experience . Other studies have shown that training - such as learning magic or taxi drivers learning the map of London - can increase grey matter densities in certain parts . Options: A Watching the TV for a long time can reduce grey matter . B The decrease of grey matter in the ACC affects emotion . C People with less grey matter prefer to use media devices . D Taxi drivers in London have more grey matter than others . Answer: B The decrease of grey matter in the ACC affects emotion . Question:
Ans: What can we learn about grey matter from the passage ?

Write a multi-choice question for the following article, with the given choices and answer: Article: Searching for airfares often seems like a game that passengers are bound to lose. Prices change from day to day, even minute to minute. Looking through multiple websites for the best deal can be a big challenge. Even when you do book, there's no guarantee that you are going to get the best price. "You just don't know when to _ . It's not like buying anything else I can think of," said George Hobica, founder of Airfarewatchdog.com. Harriet Levy paid $179 for a recent round-trip flight on American Airlines between New York and Fort Lauderdale, Florida. Sitting just one row behind her, Shirley Harrison paid $215. A few rows back, Ellis and Dianne Traub paid $317 each. There were at least 12 fares on the flight, ranging from $169 to $360. There's no reason for it, Harrison said. Fares can fluctuate significantly in just a few hours. One Delta flight from New York to Los Angeles jumped from $755 to $1,143 from a Friday to Saturday in late April, then fell to $718 on Sunday. The flight was one of a dozen the Associated Press followed over three months for a vacation between July 16 and 22. The number one finding: avoid booking tickets on weekends. It's the most expensive time to buy. There's no way to guarantee the best fare. But before booking, travelers should pay attention to this additional advice: * Book on Tuesday, Wednesday and Thursday. That's when airlines most often offer sales. * Buy in advance, but not too early. The best time is four to six weeks before traveling. In general, prices for any given flight are highest eight to 10 weeks and two to three weeks in advance. * Make use of social media. Airlines are giving more benefits like exclusive sales to travelers who interact with them on Twitter and Facebook. Those specials are often gone within hours. * The so-called discount airlines - JetBlue, Air-Tran, Southwest and Frontier - adjust their fares less frequently than other airlines, so you can feel more confident that the price will stay the same. But their prices aren't always the lowest.... Options: A show there is standard price for every single airline B discover the rules behind airfares C guarantee passengers a low price D prove airfares can vary widely Answer: D prove airfares can vary widely Question:
Ans: By using a lot of figures, the author intends to _ .

Write a multi-choice question for the following article, with the given choices and answer: Article: How "Kangaroo" Became an Animal's Name Early in the 18th century, Captain Cook, a famous explorer of Australia, unexpectedly saw an unusual animal during his first visit to Australia. The animal had a large mouth-like head and jumped along on its large legs. To his surprise, the unusual animal carried its baby in a special pocket of flesh. Captain Cook pointed to the animal which was eating grass in the distance and asked his local guide what that animal was. The guide seemed not to know what he was pointing at and finally said Kang-a-roo. Cook carefully wrote down Kang-a-roo as the animal's name in his word book. The Europeans who later got to Australia were anxious to see the unusual animal "Kang-a-roo", but their requests met with puzzled looks of the local people. Before long they got to discover that the local guide who made the answer to Cook's question really meant, "I don't know what you are pointing at." Funny enough, the name "Kang-a-roo" stuck and it is still in use today. Options: A "Ah, it is a special kind of animals." B "I wonder what you have said." C "I have no idea of what you are pointing at." D "What do you mean by pointing at that animal?" Answer: C "I have no idea of what you are pointing at." Question:
Ans: When the local guide said "Kang-a-roo" he really meant _