题目内容：

Mr.Johnson lived in the woods with his wife and children.He owned a farm,which looked almost abandoned. 1.(lucky),he also had a cow2.(produce) milk every day.He sold or exchanged some of the milk in the towns nearby for other food and made cheese and butter for the family with what3.(leave).The cow was their only means of support,in fact.One day,the cow was eating grass4.it began to rain heavily.While making great5. (effort) to run away,she6.(fall) over the hill and died.Then Johnson tried to make7.living without the cow.In order to support his family,Mr.Johnson began to plant herbs（草药）and vegetables.Since the plants took a while to grow,he started cutting down trees8.(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 market9.    people from the town met regularly.Now10.occurred to him that his farm had much potential and that the death of the cow was a bit of luck.