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Read the following article and select the best answer. Article: The average British 22 year-old has more than 1,000 online friends on sites like Facebook, compared to those in their fifties who have fewer than 20, according to a new study. The "Facebookgeneration gap" has been highlighted in a new piece of research which shows that the average 22 year-old claims to have 1,000 or more friends on sites like Facebook. People in their twenties have more than 50 times as many digital friends as those who are over 50 years old, despite the popularity of sites like Facebook with the older generations, says a study conducted by consumer research group Intersperience. The news comes during the same week Facebook's second-in command, Sheryl Sandberg, is visiting the UK to deliver a speech at the London School of Economics. Facebook's chief operating officer is going to speak about how the social web has transformed people's friendships and relationships. The survey found that there was a clear link between people's age and the number of online friends they have.The researchers found that those aged 13 to 16, have an average of 450 friends on social networks, with girls having slightly more friends that boys.People in their thirties tend to have between 100 and 200 friends, while those in their forties have between 50 and 100. However, those using sites such as Facebook over the age of 50, tended to have 20 or less friends.The oldest person surveyed was 70 years old. Paul Hudson, Intersperience's chief executive, said: "Our research underlines fundamental changes taking place in British society as a result of finally entering the digital age.Half of the UK population are on Facebook now.In a social media context, a 'friend' means something different to a 20 year old than to a 50 year old." He added: "Social networking activity is just one example of how different groups are adapting to the digital age at different paces.In this case, age is the determining factor - however in other instances it is not." Question: Which is the determining factor in social networking activity? - Gender - Age - Relationship - Pace
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Age

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Read the following article and select the best answer. Article: Fish have ears. Really. They're quite small and have no opening to the outside world carrying sound through the body. For the past seven years, Simon Thorrold, a university professor, has been examining fish ears, small round ear bones called otoliths. As fish grow, so do their otoliths. Each day, their otoliths gain a ring of calcium carbonate . By looking through a microscope and counting these rings, Thorrold can determine the exact age of a young fish. As a fish gets older, its otoliths no longer get daily rings. Instead, they get yearly rings, which can also be counted, giving information about the fish's age, just like the growth rings of a tree. Ring counting is nothing new to fish scientists. But Thorrold has turned to a new direction. They're examining the chemical elements of each otolith ring. The daily ring gives us the time, but chemistry tells us about the environment in which the fish swam on any given day. These elements tell us about the chemistry of the water that the fish was in. It also says something about water temperature, which determines how much of these elements will gather within each otolith ring. Thorrold can tell, for example, if a fish spent time in the open ocean before entering the less salty water of coastal areas. He can basically tell where fish are spending their time at any given stage of history. In the case of the Atlantic croaker, a popular saltwater food fish, Thorrold and his assistant have successfully followed the travelling of young fish from mid-ocean to the coast, a journey of many hundreds of miles. This is important to managers in the fish industry, who know nearly nothing about the track of the young fish for most food fish in the ocean. Eager to learn about his technology, fish scientists are now lending Thorrold their ears. Question: Why does the writer compare the fish to trees? - Trees gain a growth ring each day. - Trees also have otoliths. - Their growth rings are very small. - They both have growth rings.
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They both have growth rings.

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Read the following article and select the best answer. Article: Years ago a John Hopkin's professor gave a group of graduate students this task: Go to the slums . Take 200 boys, between the ages of 12 and 16, and research into their background and environment. Then predict their chances for the future. The students, after consulting social statistics, talking to the boys, and compiling much data, concluded that 90 percent of the boys would spend some time in prison. Twentyfive years later another group of graduate students was given the job of testing the prediction. They went back to the same area. Some of the boys--by then men--were still there, a few had died, some had moved away, but they got in touch with 180 of the original 200. They found that only four of the group had ever been sent to prison. Why was it that these men, who had lived in a breeding place of crime, had such a surprisingly good record? The researchers were continually told: "Well, there was a teacher..." They pressed further, and found that in 75 percent of the cases it was the same woman. The researchers went to this teacher, now living in a home for retired teachers. How had she exerted this remarkable influence over that group of children? Could she give them any reason why these boys should have remembered her? "No," she said, "no I really couldn't." And then, thinking back over the years, she said amusingly, more to herself than to her questioners: "I loved those boys." Question: Most of the 200 surveyed boys grew into good citizens because _ . - their parents were strict with them - they had great ambition as children - they were expected to do good deeds - a woman teacher loved and cared them
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a woman teacher loved and cared them