内容正文:
Cai Lun was born to a poor family in Guiyang, China, during the Eastern Han dynasty around 50 AD. He was a smart and 1._ (ambition) man. He became a clerical official in a palace at 2._ young age and was much trusted by the emperor He of Han. There is a story told about his journey to discovering paper. It all started one day when he was given a stack of documents to process at home by the emperor since he served 3._ a court eunuch. These documents were carved on bamboo strips, 4._ were given to several men to carry on a bull-drawn cart. On the way, the bull slipped and fell under the wheels halfway through the journey, making the bamboo strips fall to the ground as well. While trying to get another bull to carry the strips, Lun had time to think, and he 5._(conclude) that the strips were just too heavy and difficult 6._ carry and use.