One day a poor boy, who was selling newspapers from door to door to pay for his schooling, found he had only ten pennies(便士)left, and he was hungry．He decided to ask for a 　　1　　 at the next house．However, he had another idea when a young 　　2　　 opened the door．

　　Instead of a meal he asked for a drink of water．But as he looked 　　3　　, she brought him a large glass of 　　4　　．He drank it, and then asked,“How much do I owe(欠)you?”

　　“My mother teaches me that I should 　　5　　 get money for any kindness,”she replied,“so you don’t owe me 　　6　　．”

　　Many years later, the woman became seriously ill．Then she was sent to a famous 　　7　　 in London．

　　Dr Kelly was called in to study her illness．When he heard the name of the 　　8　　 which she came from, a strange light filled his eyes．

　　As soon as he walked 　　9　　 her room, he got to know her at once．

　　He did his best to 　　10　　 her．Then he gave special attention to her．After some time she got 　　11　　．

　　Dr Kelly asked for her final bill(賬單)before she left hospital．He 　　12　　 it, then wrote something on it 　　13　　 it was sent to her．She was afraid to open it, for she believed it would 　　14　　 the rest of her life to pay for it all．But 　　15　　 she opened it, and read these words on it：Paid in full with one glass of milk．

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