学进去

Li Shizhen was born in 1518. His father was a poor doctor. Li Shizhen often ________ that people fell ill. He decided to study medicine so that he could help ________. Li Shizhen read many books about ________. He found many of the ________ books full of mistakes (错误). So he wished to ________ a new one. He did his best to study medical science. He studied the herbs (草药) in his own garden and the wild ones. He set out many times on long journeys to ________ herbs and talk with old peasants (农民). He learned a lot from them. ________ many years of hard work and study, Li Shizhen finished his ________   works (著作) Ben Cao Gang Mu. At that time, he ________ sixty. His book is now one of the greatest contributions (贡献) of the ________ people to the medical science of the world.