*Question*
Read the article and select the best answer. Article: Taxpayers in America pay less in income tax than many Europeans, according to a Pew Research Center report. Belgium has the highest income tax rate, at nearly 56 percent of income, according to the Organization for Economic Cooperation and Development, or OECD. Taxpayers in the U.S. pay less than 36 percent of their incomes into the national treasury. Taxes pay for services provided by the government. The U.S. ranks 25 of the 34 developed countries polled in the report. An unmarried person with no children was used as an example in the report. In America, an unmarried person, with no children, making the average wage of $50,000 in 2014 paid 24.8 percent of their income in federal income tax and payroll taxes . A similar person living in Belgium would pay 42.3 percent of their income. The average among the 39 countries in the poll was 27.3 percent income tax. The deadline to pay taxes in America is usually April 15. This year, the deadline is April 18. American taxpayers complain that wealthy people and large companies pay too little tax, according to a Pew Research Center poll from 2015. Americans pay tax to fund programs like Social Security and Medicaid, according to the Pew Research Center. Last year, American taxes paid for $888 billion in Social Security benefits. Social Security pays the elderly an income after they stop working. The government also paid more than $546 billion in Medicaid and Medicare benefits. Those programs pay for health and medical care to people who cannot afford it, according to the Center on Budget and Policy Priorities. Question: How is Passage 2 mainly developed? Options: A: By showing differences B: By analyzing causes C: By describing process D: By explanations
**Answer**
A

*Question*
Read the article and select the best answer. Article: At Institute for the Future, game designer Jane McGonigal creates massive multi-player free online role-playing games (MMORPGs), which focus on social changes and environmental problems. She hopes that players will use their new skills to make the real world better. According to Jane, our addiction to gaming is actually a great thing, so long as we use it properly.Speaking at the TED (Technology/Entertainment/Design)2010 Conference, Jane says that people should devote more time to games to build the skills necessary to make the world better.People who take part in MMORPGs develop specialized skills in problem-solving as a team.So, if gamers are willing to take part in role-playing games based on real-world problems,they will be able to work together to find ways that can be used in the real world. Jane focuses on creating the kinds of video games that enable players to make a difference in their own lives and the lives of those around them.In 2007, she helped create a video game called A World Without Oil, in which 1, 800 players tried to find new ways to transport themselves in a world without oil.Even after completing the game, the players focused on the problem and its possible solutions.Her next game, Evoke, takes an even more practical way.Game players are mainly young people in Africa.They will learn to create a business that will help stop problems such as poverty and AIDS on a local level.By the end of the game, players will be guided by experts on how to start their own businesses. "We can make any future we imagine and we can play any games we want," she said at the TED Conference."So let the world-changing games begin." Question: The MMORPGs are created by Jane McGonigal to _ . Options: A: give gamers more chances to play online games B: develop gamers' problem-solving skills C: help gamers get used to social changes D: make gamers take proper attitudes towards games
**Answer**
B

*Question*
Read the article and select the best answer. Article: In many romantic movies or TV shows one scene always appears. It involves a handsome man standing outside a young woman's window, singing a love song to her to win her over. However, trying to woo a female with songs is not just something that humans do. A few animals sing love songs as well. Birds and elephants are romantic but the latest animal to _ a female might surprise you--it is the humble mouse. You may find it odd to find out that mice sing. We do not hear them because the frequency of their voice is so high. In fact, scientists have known for some time that male mice make special sounds to females, but it has always been assumed that the sounds are produced instinctively and randomly, with little thought going into the process. But new research suggests otherwise. When male mice with different voices were put in a cage together, scientists found that they would gradually change their pitches to sound like one another. But when a female mouse was put in the cage with two males, one male would change his pitch to match the other. "It was usually the smaller animal changing the pitch to match the larger animal," professor Erich Jarvis, leader of the study, from Duke University, US, told BBC News. This ability, known as vocal learning, is rare in the natural world. It had been thought to be limited to some birds, such as parrots--as well as whales and dolphins. The latest findings challenge the long-held opinion that mice cannot learn to adapt their voices. Scientists also found the part of the brain that controls the mice's singing ability. In the experiment, they damaged the cells in this part of the mice's brain and found that the animals couldn't keep their songs in pitch or repeat them any more. This also happened when the mice became deaf. Jarvis said that this finding had changed his understanding of the way mice make sound. "In mice we find that the pathways that are at least modulating these vocalizations are in the forebrain, in places where you actually find them in humans,"... Question: What do parrots, whales and dolphins have in common according to the passage? Options: A: They are all animals well-known for their smart appearances. B: They are often chosen to carry out scientific experiments on. C: They all have the ability to learn to adapt their voices. D: Their numbers are quite limited in the natural world.
**Answer**
C