Our school organized us to watch the live show of the 60^th Anniversary of Miyun Reservoir yesterday, through which I learned about its history, the local people’s contribution in the process. Miyun Reservoir was built 60 years ago    1    (solve) the flood in Chaobai River and provide sufficient water supply for Beijing. At that time, there was no modern equipment and the reservoir was built    2    hands and wheelbarrows. 200,000 workers and soldiers worked hard and sweated in the place. In order to make room for the construction of Miyun Reservoir, more than 60, 000 local residents    3    (leave) the places where they had stayed for generations. As a member in Miyun, I decide to volunteer in all kinds of    4    (activity) of building my hometown more beautiful.