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閱讀理解

　　In the 13^th century, the famous Indian traveller, Marco Polo, travelled a long way to China．He saw many wonderful things．One of the things he discovered was that Chinese used paper money．In western countries, people did not use paper money until the 15^th century．However, people in China began to use paper money in the 7^th century．

　　A Chinese man called Cai Lun invented paper almost 2,000 years ago．He made it from wood．He took the wood from trees and made it into paper．He then put these pieces of paper together 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 much paper, there will not be any trees left on the earth．If there are no trees, there will be no paper．Every day, people throw away about 2,800 tons of paper in our city．It takes 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 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 also use cotton handkerchiefs(手帕)and paper ones．When we go shopping, we can use fewer paper bags．If the shop assistant does give us a paper bag, we can save it and refuse(拒絕)it later．

　　Everyone can help to save paper．If we all think carefully, we can help protect trees．But we should do it now, before it is too late．

完形填空

　　“You are my best friend．” It’s the nicest thing you can 　　1　　 to someone．It’s also the nicest thing you can 　　2　　 someone．

　　Good friendships begin in middle school．It’s the 　　3　　 you begin to develop your own personality．Your parents aren’t around so you 　　4　　 lots of time every day sharing your life with your classmates．You talk with them, you work with them and you become friends with them．But 　　5　　 them will become your “best” friend．

　　Best friends are the people who like you and 　　6　　 you the most．They are the 　　7　　 who are easy to work with and easy to have fun with．

　　Sometimes it’s 　　8　　 to find a best friend．And sometimes you can 　　9　　 a little lonely．But just because you don’t have best friend now, it doesn’t mean you 　　10　　 one in the future．Best friends seem to find each other as if by magic．And when you find your best friend, the magic will last forever．