语法填空 Dujiangyan is the oldest man-made water system in the world, and a wonder in the development of Chinese science.{#blank#}1{#/blank#} (build) over 2, 200 years ago in what is now Sichuan Province in Southwest China, this amazing engineering{#blank#}2{#/blank#}(achieve) is still used today.
In ancient times, the region in which Dujiangyan now stands{#blank#}3{#/blank#}(suffer) from regular floods caused by overflow from the Minjiang River.{#blank#}4{#/blank#} (help) the victims of the flooding, Li Bing, the region governor, together with his son, decided to find a solution. Li Bing, the region governor, together with his son, decided t find a solution. Li designed a series of channels built at different levels along Mount Yulei that would take away the floodwater while leaving the river flowing naturally.{#blank#}5{#/blank#} (good) still, the extra water could be directed to the dry Chengdu Plain, making{#blank#}6{#/blank#}suitable for farming.
Once the system was finished, no more floods occurred and the people were able to live {#blank#}7{#/blank#}(peaceful). Today, Dujiangyan is admired by scientists from around the world because of one feature. Unlike modern dams{#blank#}8{#/blank#} the water is blocked with a huge wall, Dujiangyan still lets water flow through the Minjiang River naturally{#blank#}9{#/blank#} (enable) ecosystem(生态系统) and fish populations to exist{#blank#}10{#/blank#}harmony.