单项选择题
| What is paper made form When we
(41) books or newspapers, we seldom stop and think about
the things (42) to make them. (43)
paper our lives would be very different. Paper is one of (44) important inventions(发明) of all time. The people in Egypt (埃及) first used a kind of grass like plant to (45) paper around five (46) years ago. 3000 years later, a Chinese man created a new (47) of paper using pieces of old cloth. Then for several hundred years, people (48) the world had been using this Chinese method to make paper. In 1838, a Canadian man invented a (49) method of papermaking using wood. Today, most of the paper we use is made from (50) . |