In the 13th century, the famous Indian traveler, Marco Polo, traveled a long way to China.
One of the things he discovered was that the Chinese used paper money. In westerncountries, people did not use paper money until the 15th century. However, people in China began touse paper money in the 11th century.
A Chinese man called Cai Lun invented paper almost 2,000 years ago. He made it from wood. Hetook the wood from trees and made it into paper. He then put these pieces of paper together and madethem into a book.
Now paper still comes from trees. We use a lot of paper every day. If we keep on wasting so muchpaper, there will not be any trees left on the earth. If there are no trees, there will be no paper. ②Every day, people throw away about 2,800 tons of paper . It takes 17 trees to make one ton of paper.This means that we are cutting down 48,000 trees every day.
Since it takes more than 10 years for a tree to grow, we must start using less paper now. If we don’t, we will not have enough time to grow more trees to take the place of those we use for paper.So how can we save paper? We can use both sides of every piece of paper, especially when we are making notes.We can choose drinks in bottles instead of those in paper packets. We can also use cotton handkerchiefs(手帕) and not paper ones. When we go shopping, wecan use fewer paper bags. If the shop assistant does give us a paper bag, we can save it and reuse it later.
Everyone can help save paper. If we all think carefully, we can help protect the trees. But we should do it now, before it is too late.
将处翻译成汉                                                                   .
根据②处完成下面的句子。（每空一词）
Every   day ,about  2800  tons  of  paper  _____   ____away    by  people  all  over  the  world.
根据短文内容完成下面句子。（每空一词）
Paper is made from trees，so we should try our best to save paper
_____   ______we can help protect the trees.