One day in Africa, a mouse was hurrying home. He was going so {#blank#}1{#/blank#} that he ran right into a sleeping lion. The lion woke up and {#blank#}2{#/blank#} (catch) the mouse. "If you let me go, I'll do something for you in return(回报)," the mouse cried. "How could a small animal like you help {#blank#}3{#/blank#} a big and strong animal as me?" But the lion still let him go. "Thank you! I won't forget you," said the mouse.

    A few days later, some people were looking for wild animals. They {#blank#}4{#/blank#} (hang) a big net from three trees and tied a piece of meat to it.

    One evening, the lion made no kill and decided to return home. Just then, he smelled something delicious. When the lion found the {#blank#}5{#/blank#} , he pulled it down and the net fell down over him. The lion tried to get away but it was no use. After a while, he stopped trying. Before long, the lion {#blank#}6{#/blank#} (hear) a voice. It was from the mouse he had set free a few days ago. "I've come to help you," said the mouse. "How can you help me? I'm caught in the net and {#blank#}7{#/blank#} can help me now," the lion said sadly. But the mouse got to work, biting the net with his sharp {#blank#}8{#/blank#}(tooth). At last, he made a {#blank#}9{#/blank#} in the net big enough for the lion to escape.

    So the little mouse did what he had {#blank#}10{#/blank#} (promise) to do--help the lion. One of the nature's strongest animals had been saved by one of the smallest and weakest.