Although there are many skillful Braille readers, thousands of other blind people find it difficult to learn that system. They a

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问题     Although there are many skillful Braille readers, thousands of other blind people find it difficult to learn that system. They are thereby【C1】______from the world of books and newspapers, having to【C2】______on friends to read aloud to them.
    A young scientist named Raymond Kurzweil has now designed a computer which is a major【C3】______in providing aid to the【C4】______. His machine, Cyclops, has a camera that【C5】______any page, interprets the print into sounds, and then delivers them orally in a robot-like【C6】______through a speaker. By pressing the appropriate buttons on Cyclops’s keyboard, a blind person can "read" any【C7】______document in the English language.
    This remarkable invention represents a tremendous【C8】______forward in the education of the handicapped. At present, Cyclops costs $50,000.
   【C9】______, Mr. Kurzweil and his associates are preparing a smaller【C10】______improved version that will sell for【C11】______than half that price. Within a few years, Kurzweil【C12】______the price range will be low enough for every school and library to【C13】______one. Michael Hingson, Director of the National Federation for the Blind, hopes that【C14】______will be able to buy home【C15】______of Cyclops for the price of a good television set.
    Mr. Hingson’s organization purchased five machines and is now【C16】______them in Maryland, Colorado, Iowa, California, and New York. Blind people have been【C17】______in those tests, making lots of【C18】______suggestions to the engineers who helped to produce Cyclops.
    "This is the first time that blind people have ever done individual studies【C19】______a product was put on the market," Hingson said. Most manufacturers believed that having the blind help the blind was like telling disabled people to teach other disabled people. In that【C20】______the manufacturers have been the blind ones.
【C3】

选项 A、execution
B、distinction
C、breakthrough
D、process

答案C

解析 C项意为breakthrough“突破,重大进展”,代入后表示这种计算机在为盲人提供援助上是一项突破,句意通顺,故本题选C。
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