Most people around the world are right-handed . This also seems to be true in history . In

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 left 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 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（基因）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 .
【小题1】 After studying works of art made at different times in history , the scientists found .
A. art began from 1, 500 B.C.
B. the works of are ended in the 1950s
C. most people shown in the works of art are right-handed
D. most people shown in the works of art are left-handed
【小题2】How many people in the world are left-handed now ?A．Less than one sixth .B．More than a half .C．About 40% .D．The passage doesn’t tell us .【小题3】What is the left hand for most people used to do ?A．It’s used to find or hold things .B．It’s used to work with things .C．It’s used to make a person’s eyes work together .D．It’s the centre for thinking and doing problems .【小题4】 According to the passage , which of the following is NOT true ?A．No one really knows what makes a person become right-handed .B．Left-handedness is cleverer than right-handedness .C．Today children are not made to use their right hands only .D．Scientists think there must be some reason why people become left-handed .【小题5】 The best title for this passage is .A．Scientist’s New InventionsB．Left-handed People C．Which HandD．Different Brains , Different HandsC

(答案→)C 解析：【小题1】C 细节题。根据第一段2,3行Most of the people shown in these works are right-handed , so the scientists guessed that right-handedness has always been common through history .说明C正确。【小题2】A 细节题。根据第一段最后一句Today , only about 10% to 15% of the world’s population is left-handed .说明现在世界上的人中不到六分之一的人是左撇子，故A正确。【小题3】A 细节题。根据第二段第二行For most people , the left hand is used to find things or hold things .说明A正确。【小题4】.B 细节题。根据最后一段第一句No one really knows what makes a person become right-handed instead of left-handed .说明A的说法是正确的；根据最后一段最后2行A long time ago , left-handed children were made to use their right hands like other children , but today they don’t have to .说明C的说法正确。细节题。根据第三段第三行so scientists guess there must be another reason why people become left-handed说明D说法正确。B在文章里没有提及。【小题5】C 主旨大意题。文章讲述的是人们使用左手还是右手的问题，故C符合。

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