There are many mice in the house. The man of the house ___1___ a cat. The cat kills（杀死）many of ___2___. Then the oldest（最老的）mouse says,“All mice come to my room tonight（今晚）. Let us put our heads together（一起）and think ___3___ to do. We can do about（除掉）the cat.”All the mice come. Many mice ___4___, but no one knows what to do ___5___ a young mouse stands up and says,“We must put a bell（铃）on the cat. When the cat comes near, we ___6___ hear（听见）the bell and run away and hide（躲藏）.___7___ the cat will not catch any of us.”But the old mouse asks,“___8___ will put the bell on the cat?”

　　The old mouse waits（等待）, but no one answers. At last the old mouse says,“it is easy to say things, but it is ___10___ to do them.”