事故(Accident)

　　one sunny afternoon， when i was merrily riding home， i heard "help! help!"。 i rode to the riverside and found a boy of about five in the river struggling。 i jumped into the water， swam to the boy and dragged him to the river bank。 the boy said he was trying to catch a fish near the river bank and carelessly fell into the water。 i asked him where his home was and sent him home。 "thank you very much!" the boy's parents said， when i left his home。 though i got home late that afternoon， i was very happy。