Dujiangyan,     1    (locate) on the Minjiang River in the west of the Chengdu Plain, is about 50 kilometers away     2    Chengdu City. Dujiangyan     3     (build) in the third century BC,     4     is unique since there is no need to use dams to regulate the flow of water. For more than two thousand years, Dujiangyan has been     5     (effect) in flood control and irrigation,     6     (make) the Chengdu Plain a fertile soil for drought and flood protection. Also, it is one of China’s most important grain production     7    (area). As     8     oldest water control project in the world, the Dujiangyan Project shows the wisdom of the     9    (harmony)coexistence of nature and our people, which     10    (be)still in use and can control water without any blocking dam.