阅读理解。 Learning disabilities are disorders in the ways people understand or use language. They can affect the ability to listen or think, or to speak, or to read, or to write and do mathematics. A person with a learning disability has unusual difficulty in developing these skills. Researchers believe that learning disabilities are caused by differences in the way that the brain works with information. They say children with learning disabilities are not unintelt or do not want to work. Their brains just process information differently than other people. Researchers say that one in five people in America has some kinds of learning disability. Almost three million children in America receive some kinds of help in school for a learning disability. How can you tell if someone has a learning disability? Experts look for a difference between how well a child does in school and the level of intelce or ability of the child. But there is no sign of a disorder. A few signs of a learning disability include not connecting letters with their sounds or not understanding what is read. A person with a learning disability may not be able to understand a funny story. They may not follow directions. They may not read numbers correctly or know how to start a task Different people have different kinds of learning disabilities. Another may have difficulty understanding what people are saying. Still another may not be able to express ideas in writing. These different kinds of learning disabilities are known by different names. For example, a person who has difficulty reading may have dyslexia . Someone who cannot do mathematics may have a disorder called dyscalculia (计算困难). Experts say learning disabilities cannot be cured. But people who have them can be helped. Teachers and parents can help young people with learning disabilities to learn successfully. 1. What does the passage mainly talk about? A. Some kinds of help in school for a learning disability. B. How to cure learning disabilities. C. Causes of learning disabilities. D. Learning disabilities. 2. It is believed that ____ is the main cause of learning disabilities. A. different brain B. unintelce C. not wanting to work D. the way the brain works with information 3. People with learning disabilities may have no trouble ____. A. understanding a funny story B. following directions C. dressing themselves D. reading numbers correctly 4. The underlined word in the 4th paragraph probably means ____. A. difficulty in seeing B. problem in reading C. trouble in listening D. brain disorder