Some of the world’s most famous persons had suffered from a similar disability, such as Albert Einstein, the mathematician; Thomas Edison, the inventor; Auguste Rodin, the artist. What disabled these three famous men? Strange as it may seem, they all suffered from learning disabilities. They had great difficulty learning to read, write or use numbers. Almost always, there is a problem with one of the mental processes needed to understand or use written signs or spoken language. Yet he or she is unable to recognize difference in sizes, shapes or sounds that are easy for others to recognize. Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times as many boys as girls have learning disabilities.
Since about 1970, new research has helped brain scientists understand these problems better. Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things. There is no longer any question that all learning disabilities result from differences in the way the brain is organized.
You can not look at a child and tell if he or she has a learning disability. There is no outward （外部的） signs of disorder （混乱）. So some researchers began looking at the brain itself to learn what might be wrong. In one study, researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things. One involved cells in the left side of the brain, which control language. These cells normally are white. In the learning-disabled person’s brain, however, these cells were gray . The researchers also found that many of the nerve cells were not in a line the way they should have been. The nerve cells were mixed together.
60. How can we learn whether a person has suffered from a learning disability or not?
A. By judging whether she or he sees or hears perfectly well.
B. By checking whether he or she is of normal or great intelligence.
C. By judging whether he or she is the world’s most famous person or not.
D. By judging whether he or she has any difficulty in recognizing the difference in sizes, shapes or sounds.
61. Which of the following statements is TRUE?
A. Among the children suffering from learning disabilities, girls are fewer than boys.
B. It is reported that many more girls have learning disabilities than boys.
C. All the world’s most famous persons have the chance to get the similar disorder. 
D. All the world’s most famous persons have suffered from learning disabilities.
62. Why did researchers examine the brain of a learning-disabled person who had died in an accident?
A. To try to look at the brain itself to find out the cause of learning disabilities.
B. To see if the person had any outward signs of disorder.
C. To check if the person is of normal or great intelligence.
D. To find out if the person suffered from a learning disability.
63. If someone has a learning disability, _______.
A. his or her nerve cells are in a line
B. he or she is able to recognize difference in sizes, shapes or sounds
C. he or she has no difficulty in learning to read, write or use numbers
D. his or her nerve cells in the left side of the brain are gray and are not in a line