10.Before the invention of paper,stone,bamboo,wood and silk were used for recording and remembering things.However,there were many difficulties in using the materials for writing.The stone was heavy.The silk was too (1)
(昂貴的)to use.Bamboo and wood took up a large (2)
(量)of space. So there was a great need for a cheap and easy way to write.After lots of (3)
(研究)and practice,paper was invented to (4)
(取代)other materials.According to Chinese history,Cai Lun invented paper over 1,900 years ago. In the beginning,paper was (5)
(主要地)used for recording important events.Paper also helped (6)
(傳播)knowledge.With cheap paper,great and new ideas could be passed quickly and widely.Later,with the (7)
(發展)of technology,paper was also used in many other ways.For example,paper was made into fans and umbrellas.In Japan,the walls of homes were often made of rice paper(宣紙).Nowadays,although we use (8)
(電子的)equipment,such as computers and mobile phones,paper is still around us-(9)
(教科書),shopping bags,paper money,toilet paper,etc.We use paper in many ways every day.Paper is truly one of the most (10)