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

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.
【C10】
选项 A、but
B、than
C、or
D、then
答案A
解析 本题宜采用排除法。首先，空格前是冠词a和形容词smaller，空格后是作形容词的过去分词improved和名词version，推断此空需填连词，连接smaller和improved这两个修饰成分，D项then不是连词，可先排除。若选B项than，则与smaller构成比较结构。这样一来a smaller后面就缺了名词成分，语法不通。根据下文所述，可知新版的计算机应该更方便和更便宜，即有所改良，改良后更方便使用，故smaller“更小巧”和improved“经改进的”不是二选一的关系，故也可排除C项or。故选A项。
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