As we all know， Wang Xuan was a very famous computer scientist and inventor in the world． He is famous （1）　　the Chinese Language Laser typesetting（激光照排系统）．

      Laser typesetting for Chinese language was a serious problem for scientists all over the world． But Wang Xuan was not afraid to try new technology． Although he （2）　　（fail） many times， he never gave up． He is believed to be the （3）　　 （important） developer in printing Chinese after Bi Sheng． Now， Wang Xuan's amazing invention（4）　　（use） all over the world．

      Wang Xuan's story teaches us that a person （5）　　（follow） his own dream and try his best to make it come true．