a STORY aboutOnce upon a time 从前从前oak n . 橡树橡树acorn n . 橡果橡果fail vt. 失败失败beat vt.打，敲打，敲 (过去分词过去分词 beaten 或或 beat ,过去式过去式 beat)Vocabulary Once upon a time there was an old mother pig and three little pigs and they lived in the middle of an oak forest . While the children were still quite small the acorn crop failed . That made it diffcult for mother to find enough food for her childern to eat . And the little pigs had to go hungry. So at last the mother pig sent the little pigs of to search their fortunes . The three little pigs met a bad wolf ,who was hungry and finding food . Finally , the little pigs fought with the wolf and beat it.