A wolf once saw some sheep eating grass at the foot of a hill.The wolf was hungry and wanted very much to catch one and eat it.But hecould not go among the sheep，because there was a man with them.The man was a shepherd.He was looking after his sheep.Then the wolf had an idea.He put on a sheep's skin and went in among the sheep.He killed a lot of them.Of course the shepherd did not know the wolf was among his sheep，because his enemy was in a sheep's skin.
Every day the wolf ate one or two of the sheep. The shepherd was worried. "Who is killing my sheep?"he wondered. "I' ll catch him andhang him."But still, more sheep were killed. Now more than ten were dead. The shepherd became very angry. He walked about among the sheep day and night and watched carefully. One day he saw that one of his sheep did not eat grass and did not walk like the others.
"That's not a sheep", he thought. He came up close to it and looked at it carefully. He saw it was really a wolf in a sheep's skin! "Tliat's the enemy. He's killed my sheep,"the shepherd said to himself. Then he took a rope and walked quietly near the wolf. Suddenly he threw the rope around the wolf's neck. Then he pulled the wolf to a tree neaiby and hanged him. At that time two other shepherds were passing the place. They were very surprised when they saw a sheep hanging from a tree. But after they heard the story, they said, "You' ve done the right thing. A wolf in a sheep's skin is our most dangerous enemy.