“哎呀,我的耳朵怎么听不见声音了!”外福来着急地大喊。妈妈匆忙跑来,手足无措。“妈妈,您说什么?我听不到!”他把手掌放在耳朵后面围成喇叭状,仍是不起作用。他戴上爷爷的助听器,还是一点儿也不管用。想到以后再也听不到声音了,他悲伤极了,把头埋在膝盖里,呜呜地哭起来。“或许我能帮你。”一只小老鼠轻轻地碰了碰外福来的脚尖,边比画边说。“你是谁?为什么背上长了一只人耳朵?” “Oh, how can my ears hear no sound!” Mother ran in a hurry, at a loss. “Mom, what did you say? I can not hear!” He put the palm behind the ear and trumpet, still no effect. He wore a grandfather’s hearing aid, or not at all. He could not hear any more in the future, and he was very sad, his head buried in his knees, crying whining. “Maybe I can help you. ” A little mouse touched the outer tip gently, while painting edge. “Who are you? Why do you have a human ear back?”