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High on the Qinghai-Tibet Plateau 【小题1】(lie) China’s “water tower” Sanjiangyuan. It is home to the headwaters of China’s three rivers: the Yellow River, Yangtze River, and Lancang(Mekong) River. It is the three rivers 【小题2】 provide water for about half the population of China. However, human activities are putting this ecosystem 【小题3】 risk. Hopefully, though, we can repair this damage. In 2016, the Chinese government established Sanjiangyuan National Park in Qinghai province. The park, 【小题4】(schedule) to open in 2020, has increased the area’s green coverage and attracted more wildlife. The local government has also made great effort to improve biological diversity. The success of Sanjiangyuan will mark the start of a 【小题5】(green) future. With Sanjangyuan 【小题6】(take) the lead, nine other regions in China 【小题7】(choose) by a field conservation station to carry out projects over the past three years, 【小题8】 will form a national park system together. The idea of a national park system is still new in China, but【小题9】(it) realization is urgent. After all, building an ecological civilization bears great   【小题10】(important) in the development and progress of human civilization.