Jim is a young farmer. He was once put into prison( ). One day, he got a letter from his mother. " I'm so worried about our farm,"she wrote."it's time to plant potatoes. I can't dig ( ) all the fields( ) by myself." Jim read the letter and became sad. " What can I do?" he thought. Then he had a good idea. He wrote to his mother," don't dig the fields. There is much money in the earth. Don't plant potatoes until I come home." Some days later, Jim got another letter from his mother. It said, " Two days ago, about ten men came to our farm and dug all the fields. I can't understand it. It seemed that they were looking for something. What should I do?" Jim smiled when he read his mother's letter. He wrote a letter to his mother at once. It was very short. Guess what it would say. In the letter to his mother, Jim told his mother not to  _  .
dig the fields dig for the money ask others for help go to the prison to see him