完形填空Chinaisalargecountryofagricul

完形填空China is a large country of agriculture（农业）.We all know that there are more than 800 million 1 in China. China starts to  2 the science of agriculture much earlier than other countries in the world. While people in Europe and America were trying to shoot wild animals and birds for food, farmers in China were  3 the science of agriculture. For example, Jia Sixie, who lived in the Northern Wei period（386-534 AD）,was one of the farming pioneers. After he finished his work in government, he 4 home and spent his time on research into agriculture. He 5 information, did experiments and learnt from the experience of farmers. He wrote a book called Qi Min Yao Shu. The book 6 has 110000 words is about both farming and gardening. This book is 7 to be an important summary（概要）of the knowledge of farming.1.A.workersB.farmersC.pioneersD.scientists2.A.developB.growC.chooseD.interest3.A.tryingB.workingC.studyingD.growing4.A.leftB.builtC.destroyedD.returned5.A.advisedB.improvedC.collectedD.planted6.A.whoB.whomC.itD.which7.A.madeB.consideredC.keptD.studied