An old engineer went suddenly blind.She promised a doctor a lot of money if he could make her see again.“If you fail,” she said, “you'll get nothing.” The doctor agreed.

    The doctor soondiscoveredwhat was wrong with her, but he decided not to cure her right away.Instead each time he visited, he secretly took some of her things.When he had taken away everything, he wanted to cure her blindness and asked for the money.

    Now the old woman could see again, she noticed that all her things had gone and she refused to pay the money.So the doctor took her before a judge(法官).

    “What the doctor said is true,”she said to the judge.“But I say I was not well cured, because I still can't see any of the things in my house.”

    The old woman won the case and the doctor went away unhappily without getting his pay.