单项选择题

Questions 1 to 5 are based on a conversation. At the end of the conversation you will be given 10 seconds to answer each of the following five questions. Now listen to the conversation.
Who found out that paper could be made from trees

A．An Englishman.
B．A Canadian man.
C．A Swedish man.
D．A German.

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单项选择题

单项选择题

Questions 1 to 5 are based on a conversation. At the end of the conversation you will be given 10 seconds to answer each of the following five questions. Now listen to the conversation. Who found out that paper could be made from trees 您的浏览器不支持 audio 元素。