China is a large country of agriculture（農(nóng)業(yè)）. We all know that there are more than 800 million  1 China. China starts to  2  the science of agriculture much earlier  3 other countries in the world . 4  people in Europe and America were trying to shoot wild animals and birds for food, farmers in China were 5  the science of agricukture.For example, Jia Sixie, who lived in the Northern Wei period （386—534AD）, 6  one of the farming pioneers. After he finished his work in government, he 7  home and spent his time on research into agriculture. He 8  information did experiments and learnt from the experience of farmers. He wrote a book called Qi Min Yao Shu. The book  9  has 110000 words is about both farming and gardening. This book is 10   to be an important summary（ 概要 ） of the knowledge of farming.

1．A．workers           B．farmers          C．pioneers         D．scientists

2．A．develop            B．grow            C．choose         D．interest

3．A．to             B．till               C．then            D．than

4．A．Where             B．For              C．While           D．Because

5．A．trying          B．working         C．studying         D．growing

6．A．were            B．was             C．came           D．be

7．A．left            B．built     C．returned                D．destroyed

8．A．a(chǎn)dvised         B．improved         C．collected        D．planted

9．A．who             B．whom           C．it               D．which

10．A．made            B．considered       C．kept             D．studied