Many years ago，in a small village，an old man was hired（雇佣） to clear the spring（泉水）up on the mountain．He took care of the spring every day，and （71）s 　 　away all the leaves and other things （72）t 　 　would make the water dirty．Soon，beautiful swans（天鹅） came to the clear spring，and the village became a popular attraction for visitors．

Years passed．One evening the town leaders held a meeting，As they looked at the salary list，one of them said，"Why do we keep these old man （73）o 　 　year after year？I don't think we need him or his work．"Later，the old man was（74）t 　 　to leave．

For several weeks，nothing changed．When early （75）a 　 　came，the leaves began to fall off the trees，and the spring was covered with leaves．A few days later，the water was much darker．Only a few months （76）a 　 　the old man left，all the swans left，and the （77）t 　 　didn't come，either．

Then they （78）r 　 　their mistake and rehired the old man．a few weeks later，the spring began to clear up．Soon new life （79）r 　 　to the village．

So，my friends，do you see？No matter how small your work seems to be，（80）n 　 　look down upon it．Anything we can do will make a difference．