Thomas Alva Edison didn’t “invent” the light bulb, but rather he ______ a 50 –year –old idea, which is not well –known.

A. improved upon    B. take down       C. put up        D. break away

       A   


解析:

       題意：鮮為人知是的，愛迪生并沒有發(fā)明燈炮，而是在其50年前的發(fā)明上改進(jìn)了電燈泡（把燈絲壽命延長到13.5小時）。improve on/upon超過，改進(jìn)；take down把…… 拆卸開；put up張貼，搭建；break away擺脫。

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Thomas Alva Edison didn’t “invent” the light bulb (燈泡), but rather he ______ a 50 –year –old idea, which is not well –known.

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Thomas Alva Edison didn’t “invent” the light bulb (燈泡), but rather he ______ a 50 –year –old idea, which is not well –known.

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Thomas Alva Edison was awarded more patents on inventions than any other American.When he died in 1931，Americans wondered how they could best show their respect for him.One suggestion was that the nation observe a minute or two of total blackout.All electric power would be shut off in homes，streets，and factories.Perhaps this suggested plan made Americans realize fully what Edison and his inventions mean to them.Electric power was too important to the country.Shutting it off for even a short time would have led to complete confusion.A blackout was out of the question.

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Thomas Alva Edison was awarded more patents on inventions than any other American. When he died in 1931, Americans wondered how they could best show their respect for him. One suggestion was that the nation observe a minute or two of total blackout. All electric power would be shut off in homes, streets, and factories. Perhaps this suggested plan made Americans realize fully what Edison and his inventions mean to them. Electric power was too important to the country. Shutting it off for even a short time would have led to complete confusion. A blackout was impossible.

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