第3部分：概括大意与完成句子(第23--30题，每题1分，共8分)
　　下面的短文后有2项测试任务：(1)第23～26题要求从所给的6个选项中为第2～5段每段选择1个最佳标题；(2)第27～30题要求从所给的6个选项中为每个句子确定1个最佳选项。

Understanding Autism

　　1 Autism (孤独症)is a life-long developmental disability that prevents individuals from properly understanding what they see，hear，and otherwise sense. This results in severe problems of social relationships，communication，and behavior. Individuals with autism have to painstakingly '(费力地)learn normal patterns of speech and communication，and appropriate ways to relate to people，objects，and events，in a similar manner to those who have had a stroke.
　　2 The cause of autism is still unknown. Some research suggests a physical problem affecting those parts of the brain that process language and information coming in from the senses. There may be some imbalance of certain chemicals in the brain. Genetic (遗传的)factors may sometimes be involved. Autism may indeed result from a combination of several “causes”。
　　3 Most people with mental retardation (智力迟钝的)show relatively even skill development. Individuals with autism，however，typically show uneven skill development，with deficits (~欠缺)in certain areas - most frequently in their ability to communicate and relate to others - and distinct skills in other areas. It is important to distinguish autism from mental retardation or other disorders，since diagnostic (诊断的)confusion may lead to inappropriate and ineffective treatment techniques.
　　4 In general，individuals with autism perform best at jobs which are structured and involve a degree of repetition. Some people who have autism are working as artists，piano tuners，painters，farm workers，office workers，computer operators，dishwashers，assembly line workers，or employees of sheltered workshops or other sheltered work settings.
　　23 Paragraph 1________
　　24 Paragraph 2________
　　25 Paragraph 3________
　　26 Paragraph 4________
　　A　What causes autism?
　　B　How common is autism?
　　C　Does autism occur together with other disabilities?
　　D　Whutism?
　　F　What kinds ofat is the difference between autism and mental retardation?
　　E　What is a jobs can individuals with autism do?
　　27　Individuals with autism are particularly weak at
　　28　It is possible that autism happens as a result of
　　29　Autism and mental retardation should be treated with
　　30　A typical feature of people with autism is their uneven
　　A　different techniques
　　B　social relationships and communication
　　C　language and information
　　D　several causes working together
　　E　a degree of repetition
　　F　skill development