B    This story happened in a small mountain village. One day there was an earthquake （地震）. Nothing was destroyed and （51） was hurt. But a huge rock fell from a nearby mountain and stopped in the middle of the road.    When the earthquake （52）, many people came to the road and saw the huge rock. Some of the strongest men tried to lift the rock （53） the road. But they couldn't move it. They tried to push it but failed. They tried to （54） it with ropes but nothing worked.    "Well," they all agreed, "There's nothing we can do about it. We'll have to change the （55）." At this time a boy of 12 years old said, "I think I can help you to move the rock."    "You、" they shouted, "What are you talking about、" The men all （56） at the boy.    The next morning some people came into the street. One of them shouted, "The rock is （57）!" More people ran out to see. It was true. The rock wasn't in the road any more. It wasn't （58） near the road.    "This is （59）," they said, "Where did it go、"    The boy stood in the street, （60）, "I told you I could move it last night."    The boy walked over to where the （61） had been and uncovered some earth. "I buried it," he said.    The people looked （62）. "You see," he said, " I dug a deep hole next to the rock and I dug a small incline （斜坡） up to the rock and the rock （63） down into the hole by itself. I covered it with earth."    The crowds shouted, "What a （64） boy!" And some of them said, "Why haven't we thought of this good （65）、"