摘要：根据下列短文内容.在空格处填入一个恰当的单词形式.使短文意思完整.每空一词. In the 13th century, the famous Italian traveler, Marco Polo, traveled a long way to China. 84 his stay in China, he saw many wonderful things. 85 of the things he discovered was that the Chinese used paper money. In western 86 , people did not use paper money 87 the 15th century. However, people in China began to use paper money in the 7th 88 . A Chinese man 89 Cai Lun invented paper almost 2,000 years ago. He made it 90 wood. He took the wood from the trees and made it 91 paper. He then put these pieces of paper 92 and made them into a book. Now paper still comes from trees. We use a lot of paper every day. If we keep on wasting so 93 paper, there will not be any trees 94 on the earth. If there are 95 trees, there will be no paper. Every day, people throw 96 about 2,800 tons of paper in our city. It 97 17 trees to make one ton of paper. This means that we are cutting nearly 48,000 trees every day. Since it takes more than 10 years 98 a tree to grow, we must start using 99 paper now. If we don’t, we will not have enough time to grow more trees to take the place of 100 we use for paper. So how can we save paper? We can use 101 sides of every piece of paper, especially when we are making notes. We can choose drinks in bottles instead of those in 102 packets. We can also use cotton handkerchiefs and not paper 103 . When we go 104 , we can use fewer paper bags. If the shop assistant 105 give us a paper bag, we save it and reuse it later. Everyone can help to 106 paper. If we all think carefully, we can help 107 trees. But we should do it now, 108 it is too late. 84. 85. 86. 87. 88. 89. 90. 91. 92. 93. 94. 95. 96. 97. 98. 99. 100. 101. 102. 103. 104. 105. 106. 107. 108.

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