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.
【C9】

选项 A、likewise
B、Furthermore
C、However
D、Though

答案C

解析 上一句说Cyclops costs $50,000,下文也出现了多处涉及价钱的信息,如sell for...than half that price,the price range will be low enough等,据此可推测下文应该讲该种计算机价格的发展变化过程。且应该是朝着越来越便宜的方向发展。空格前是现在售价高昂,空格后讲的是价格会逐渐变低,两者构成转折关系,故选C项However。
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