此题要求改正所给短文中的错误．对标题号的每一行做出判断：如无错误，在该行右边的横线上划（√）；如有错误（每行只有一个错误），请改正：
Three young pioneers were playing while they saw a young 1
tree bending to one side with some of it's leaves falling． 2
They felt sadness and decided to save it．They put 3
up a hard stick close by and tie the tree to 4
it to make it straightly．Then they made a fence 5
