Read the following article and select the best answer. Article: Most people around the world are right-handed. This also seems to be true in history. In 1799, scientists studied works of art made at different times from 1,500 B.C. to the 1950s. Most of the people shown in these works are right-handed, so the scientists guessed that right-handedness has always been common through history. Today, only about 10% to 15% of the world's population is left-handed. Why are there more right-handed people than left-handed ones? Scientists now know that a person's two hands each have their own jobs. For most people, the hand is used to find things or hold things. The right hand is used to work with things. This is because of the different work of the two sides of the brain. The right side of the brain, which makes a person's hands and eyes work together, controls the left hand. The left-side of the brain, which controls the right hand, is the centre for thinking and doing problems. These findings show that more artists should be left-handed, and studies have found that left-handedness is twice as common among artists as among people in other jobs. No one really knows what makes a person become right-handed instead of left-handed. Scientists have found that almost 40% of the people become left-handed because their main brain is damaged when they are born. However, this doesn't happen to everyone, so scientists guess there must be another reason why people become left-handed. One idea is that people usually get right-handed from their parents. If a person does not receive the gene for right-handedness, he / she may become either right-handed or left-handed according to the chance and the people they work or live with. Though right-handedness is more common than left-handedness, people no longer think left-handed people are strange or unusual. A long time ago, left-handed children were made to use their right hands like other children, but today they don't have to. Question: How many people in the world are left-handed now? - Less than one sixth. - More than a half. - About 40%. - The passage doesn't tell us.
Less than one sixth.

Read the following article and select the best answer. Article: New findings show that musical training affects the structure and function of different brain areas, how those areas communicate during the creation of music, and how the brain interprets and combines sensory information. The findings were presented at Neuroscience 2013, the annual meeting of the Society for Neuroscience and the world's largest source of emerging news about brain science and health. These views suggest potential new roles for musical training including training plasticity in the brain, offering an alternative tool in education, and treating a range of learning disabilities. Today's new findings show that long-term high level musical training has a broader effect. Researchers found that musicians have a better ability to combine sensory information from hearing, touch, and sight. The age at which musical training begins influenced brain structure and its function. Beginning training before the age of seven has the greatest effect. Even older adults who took music lessons as children but haven't actively played an instrument in decades have a faster brain response to a speech sound than those who never played an instrument, according to a study appearing November 6 in the Journal of Neuroscience. The finding suggests early musical training has a lasting, positive effect on how the brain deals with sound. "Playing a musical instrument is a multi-sensory and motive experience that creates emotions and movements--from finger tapping to dancing -- and engages pleasure and reward systems in the brain. It has the potential to affect brain function and structure when done over a long period of time," said Gottfried Schlaug, MD, PhD, of Harvard Medical School, press conference speaker, also an expert on music. "As today's findings show, musical training brings about new processes within the brain, at different stages of life, and with a range of effects on creativity, cognition , and learning," he added. Question: Why does the author mention "Even older adults ... a speech sound." in Para. 3? - To suggest how new roles for musical training work. - To prove early musical training affects the function of the brain. - To explain how the brain interprets sensory information. - To show how the brain areas communicate in music training.
To prove early musical training affects the function of the brain.

Read the following article and select the best answer. Article: Movie Extras Would you mind lying in a coffin ? Would you shave your head? Are you willing to take out your false teeth? These are just a few of the questions Anne Marie Stewart and her staff sometimes ask the "talent" who serve as non-speaking "extras" in special films, television series, and made-for-TV movies produced in Toronto. Of course, the majority of extra calls are for more ordinary people, and Stewart has a list of about 650 registered extras. Crowd scenes, which are common, call for everyday people of all ages, ethnic backgrounds, and sizes. Over at Movie People, last-minute requests are not unusual. "We got a request once for an entire brass band of 30 people. They wanted it within the hour," said manager Yvonne McCartney. Another time, the company got a last-minute request for a newborn baby. "We found a baby that was three weeks premature," said Jonathan Aiken, an owner of the company. Then there was the worried call from a casting director whose "Star" got doggone stubborn one day and decided to just lie down and not work. The director needed a replacement dog, fast. "We got them two in one hour." said Aiken. "It was a matter of good connections and fast phone work." The eight phone lines needed to make 350 to 400 calls a day are one of Movie People's major expenses. Phone lines are the only way to stay in touch with casting directors and extras; but the latter are a group not necessarily interested in a long-term relationship. Most extra jobs pay only $7 an hour (with a six-hour minimum), while most agencies charge an annual $75 registration fee and get 10 to 15 per cent of extras' earnings. It's no wonder that the _ rate is fairly high. Some people who are between jobs do extra work as a temporary measure, said McCartney. But professionals, such as lawyers, also do the work because it's interesting. Others with flexible jobs have a desire to do something different. Some homemakers want to get out of the house and onto a movie set. Money's not the motivating reason. "One of the first things... Question: Why do white collar workers most probably like to be movie extras? - They want to make more money. - They want to start a career in acting. - They think their regular job is boring. - They think being on the stage is enjoyable.
They think being on the stage is enjoyable.