2. 外语
  3. What is paper made ? When we【C1】______books or newspapers, we seldom stop and think about the things【C2】______to make them.【C3】_

What is paper made ? When we【C1】______books or newspapers, we seldom stop and think about the things【C2】______to make them.【C3】_

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问题     What is paper made ? When we【C1】______books or newspapers, we seldom stop and think about the things【C2】______to make them.【C3】______paper our lives would be very different.
    Paper is one of【C4】______important inventions(发明)of all time. The people in Egypt(埃及)first used a kind of grass-like plant to【C5】______paper around five【C6】______years ago, 3000 years later, a Chinese man created a new【C7】______of paper using pieces of old cloth. Then for several hundred years, people【C8】______the world had been using this Chinese method to make paper. In 1838, a Canadian man invented a【C9】______method of paper-making using wood. Today, most of the paper we use is made from【C10】______.
【C2】
选项 A、beused
B、used
C、using
答案B
解析 考查过去分词做定语。过去分词used表示被动，做定语，修饰前面的名词things。
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