Q: Read the following article and select the best answer. Article: A number of scientific studies have suggested that repeatedly heading a football could increase the risk of developing dementia in later life. In 2002, former England international footballer Jeff Astle died aged 59. A coroner said that Astle died from a brain disease likely to have been caused by "repeated small damages to the brain" related to heading a heavy leather football. Dr. Scott Delaney, research director of emergency medicine at McGill University Health Center in Montreal, Canada, has also researched soccer-related head injury and agrees that head-to-head or elbow-to-head blows are the real risk. In 2007, Delaney carried out a study on footballers aged between 12 and 17 that showed they were half as likely to be concussed wearing headgear than without. He said youngsters have a higher risk of head injury than adults because their heads are thinner and less able to absorb shock. To make matters worse, their neck muscles aren't as well developed and they often lack the correct heading technique that can help throw away the force of the ball. Delaney recommends that children wear headgear when playing football and says his two eldest children wear head protection playing the sport. But he admits that children can be unwilling to be the first to wear head protection--especially when their football heroes play without it. While headgear can protect footballers from being concussed during a match, no one knows the long-term effects of repeated "sub-concussive" blows to the head. Delaney says that while there is indirect evidence that a career in soccer can lead to dementia, no one has yet found a sure link between the two. He says proving a link would mean monitoring hundreds of footballers for three or four decades--and that would take a lot of funding. Question: According to Delaney's research, what is the most risky injuries to head? - Long-term effects of blows. - Wearing head protection. - Underdeveloped neck muscles. - Head-to-head or elbow-to-head blows.
A: Head-to-head or elbow-to-head blows.

Q: Read the following article and select the best answer. Article: The forces that make Japan one of the world's most earthquake-prone countries could become part of its long-term energy solution. Water from deep below the ground at Japan's tens of thousands of hot springs could be used to produce electricity. Although Japanese high-tech companies are leaders in geothermal technology and export it, its use is limited in the nation. "Japan should no doubt make use of its resources of geothermal energy," said Yoshiyasu Takefuji, a leading researcher of thermal-electric power production. The disastrous earthquake and tsunami on March 11, 2011 caused a reaction against atomic power, which previously made up 30 percent of Japan's energy needs, and increased interest in alternative energies, which account for only 8 percent. Artist Yoko Ono has called on Japan to explore its natural energy, following the example of Iceland which uses renewable energy for more than 80 percent of its needs. For now, geothermal energy makes up less than 1 percent of the energy needs in Japan, which has for decades relied heavily on fossil fuels and atomic power. The biggest problem to geothermal energy is the high initial cost of the exploration and constructing the factories.Another problem is that Japan's potentially best sites are already being developed for tourism or are located within national parks where construction is forbidden. "We can't even dig 10cm inside national parks." said Shigeto Yamada of Fuji Electric, adding that regulations protecting nature would need to be relaxed for geothermal energy to grow. Researcher Hideaki Matsui said, "Producing electricity using hot springs is a decades-long project.We also have to think about what to do for now as energy supplies will decline in the short term." The Earth Policy Institute in Washington, US, believed Japan could produce 80,000 megawatts and meet more than half its electricity needs with geothermal technology. Japanese giants such as Toshiba are already global leaders in geothermal technology, with a 70 percent market share.In 2010,... Question: What would be the best title for the text? - Alternative energies in Japan - World's largest geothermal plant - Japan takes the lead in geothermal technology - Japan thinks of geothermal energy
A: Japan thinks of geothermal energy

Q: Read the following article and select the best answer. Article: How Many Lies Do the Children Tell You? Mothers who feel their children don' t appreciate them can add another _ to the list: half the time, their children are lying to them. A study designed to expose the truth about lying shows that undergraduates lie to their mothers in 46% of their conversations. Still, mums should feel better than total strangers, who are told lies an astonishing 77 % of the time. Bella Depaulo and a team of psychologists from the University of Virginia, Charlottesville, asked 77 undergraduates to keep a record of all their conversations for a week, and write down whether they lied at any time. DePaulo named lying broadly, as "when you intentionally try to mislead someone", so she would catch the smallest of lies. The students told an average of two lies a day. They said they had been studying when they had been out drinking. One told his parents that a textbook cost $50 rather than $20 so that they would send him extra money. Female students constantly told their plain-looking roommates that they were pretty. "They are everyday lies," says DePaulo. DePaulo and her colleagues conclude that people tend to tell fewer lies to those they feel closest to. College students lied to their best friends 28% of the time but lied to acquaintances 48% of the time. In close relationships, people were more likely to tell "kind-hearted" lies, designed to protect feelings, rather than self-serving lies. Romantic partners lie somewhere between close friends and acquaintances. Students lied to romantic partners about a third of the time. DePaulo thinks that unmarried lovers can expect less honesty than best friends because of the insecurity that comes with romance. Mothers can take heart from one other finding. They may have been lied to, but at least their children talked to them. The students were recorded telling few lies to their fathers because they had little interaction with them. Question: According to the passage, college students felt closest to _ . - mothers - best friends - acquaintances - romantic partners
A: best friends