Agriculture has a long history in China. Much of the wisdom 1        by early Chinese scien?tists is still useful for fanners and gardeners today. One of China's early 2        scientists was Jia Sixie,who lived in the sixth century AD. He spent his time doing 3        into agriculture. He collected information,studied it,did experiments and learnt from the 4        of farmers.

Around 540 A D. he wrote a book called Qimin Yaoshu. The book is about both farming and 5        It includes advice on the following6 :growing green vegetables and fruit trees,keeping animals,and fish in lakes. There are also 7        for making wine. Jia Sixie's book is a(n) 8       guide for farming. Firstly,as a farmer you should do things at the right time of the year. If you sow seeds and 9        young plants in the fields at the correct time of the year,your work will be less and 10        will be better. But if you 11        nature,and do things at the wrong time of the year,you will have to do more work and the results will not be so good. The 12       of the soil is also very important. Examine the soil on your farm 13        If the condi?tion of your soil is not good,you should improve it. Before sowing or planting crops,you must clean rough ground and 14        weeds. Let sheep or cows walk on the land to 15        the weeds or eat them. The best harvest is reached when farmers 16        the crops in their fields. For ex?ample,do not plant rice 17        in the same field. But if you plant rice in a field one year and wheat in the field the next year,you will 18        good crops. Other scientists said that wheat should be planted with 19        between the plants,but Jia did experiments and 20        that planting wheat close together is better.

(   ) 1. A. discovered   B. recovered   C. reported   D. repeated

(   ) 2. A. industrial   B. agricultural   C. cultural   D. article

(   ) 3. A. search   B. research   C. experiment   D. movement

(   ) 4. A. adventures   B. advantages   C. tradition   D. experience

(   ) 5. A. nursing   B. gardening   C. produce   D. trade

(   ) 6. A. programs   B. topics   C. subjects   D. events

(   ) 7. A. instructions   B. constructions   C. measures   D. treasures

(   ) 8. A. economical   B. practical   C. similar   D. regular

(   ) 9. A. drop   B. increase   C. grow   D. throw

(   ) 10. A. dreams   B. ending   C. hope   D. results

(   ) 11. A. argue against   B. go against   C. compete with   D. deal with

(   ) 12. A. application   B. situation   C. condition   D. addition

(   ) 13. A. successfully   B. carefully   C. gradually   D. frequently

(   ) 14. A. remove   B. pull   C. kill   D. reduce

(   ) 15. A. destroy   B. prevent   C. divide   D. limit

(   ) 16. A. keep   B. improve   C. manage   D. change

(   ) 17. A. one after another   B. here and there

     C. now and then   D. year after year

(   ) 18. A. win   B. collect   C. harvest   D. plant

(   ) 19. A. holes   B. lines   C. space   D. balance

(   ) 20. A. showed   B. meant   C. intended   D. decided

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