5．What is the passage mainly about?

　　A．The life of Leo Baekeland.

　　B．The coming of the Age of Plastics.

　　C．The inventions of Leo Baekeland.

　　D．The process of inventing Bakelite.

　　解析　 主旨大意题。由文章第一段可知。

　　答案　A

　　6．Why did Leo Baekeland decide to produce a kind of photographic paper?

　　A．Because he wanted to become an employee of the Kodak Company.

　　B．Because he became aware that his own business wouldn't be successful.

　　C．Because he didn' t like working as a chemist.

　　D．Because he had a great interest in taking photos.

　　解析　细节理解题。由第三段第一句可知。

　　答案　B

　　7．What's the right time order of the following events?

　　a．Leo invented Bakelite.

　　b．Leo went to the United States.

　　c．Leo invented the paper Velox.

　　d．Leo studied at the University of Ghent.

　　e．set up his own laboratory in New York.

　　A．d，b，c，e，a

　　B．a，c，d，b，e

　　C．d，b，c，a，e

　　D．b，a，e，c，d

　　解析　细节理解题。Leo先在the University of Ghent求学，然后去了美国，生意失败之后，他发明了the paper Velox，用所得的钱在纽约建立了自己的实验室，最后发明了Bakelite。故选A。

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