What is paper made from? When we【C1】______ books or newspapers, we seldom stop and think about the things【C2】______ to make them

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问题     What is paper made from? 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】______ .
【C6】

选项 A、thousands of
B、thousand
C、thousands

答案B

解析 考查固定短语。表示“几千年”,thousand不能变复数。但表示“成千上万的”,是thousands of,thousand要变成复数。
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