阅读理解。
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 1500 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 u8ed 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 bom. 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.
1. After studying works of art made at different times in history,the scientists found _____.
A. the art began from 1500 B.C.
B. the works of art 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
2. 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 and hands work together.
D. It's the centre for thinking and doing problems.
3. According to the passage, which of the following is 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 made to use their right hands only.
D. Scientists think there is no reason why people become left-handed.
4. The best title for this passage is _____.
A. Scientists' New Inventions
B. Left-handed People
C. Which Hand
D. Different Brains, Different Hands
