基础训练篇（8）
(1)________ is known to all, China is a large country (2)_________ agriculture. Science of farming was first (3)____________ (study) here.
Jia Si-xie, living (4)____________ the 6th century AD, was one of the farming pioneers（先驱者）. After he finished his work for the government, he spent his time (5)__________ his research into agriculture. He studied (6)_________ to keep seeds, how to improve soil conditions and so on.
During the years 533~544, he wrote a book (7)__________ (call) Qi Min Yao Shu ,(8)_________ is about both farming and gardening, (9)__________ (include) advice on how to grow green vegetables, how to keep fish in lakes, and so on. It was considered to be (10)___________ important summary of farming knowledge.
