填空题：Mr. Johnson lived in the woods with his wife and children. H

Mr. Johnson lived in the woods with his wife and children. He owned ___16___ farm, which looked almost abandoned. ___17___ (lucky), he also had a cow which produced milk every day. He sold or exchanged some of the milk in the towns nearly ___18___ other food and made cheese and butter for the family with what ___19___ (leave). The cow was their only means of support, in fact. One day, the cow was eating grass ___20___ it began to rain heavily. While making great efforts to run away, she ___21___ (fall) over the hill and died. Then the Johnson tried to make a living ___22___ the cow. In order to support his family, Mr. Johnson began to plant herbs and vegetables. Since the plants took a while to grow, he started cutting down trees ___23___ (sell) the wood. Thinking about his children’s clothes, he started growing cotton too. When harvest came around, he was already selling herbs, vegetables and cotton in the market ___24___ people from the town met regularly. Now it occurred to ___25___ that his farm had much potential and that the death of the cow was a bit of luck.
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