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　　One day, a poor boy was selling goods from door to door to pay for his tuition fees(学费)．He was hungry．He d　　1　　 he would ask for a meal at the next house．However, he lost heart w　　2　　 a lovely young woman opened the door．He asked for a drink of water and the woman agreed．She thought he looked hungry, so she b　　3　　 him a large glass of milk．He drank it slowly, and then asked, “How much do I owe(欠)you? ” “You owe me nothing, ” she r　　4　　．“Mother has taught us never to accept pay for a kindness．” He said, “Then I thank you from my heart．”

　　Years later, that young woman become seriously i　　5　　．The local doctors all f　　6　　 to cure her．They finally sent her to the big city, where they called in specialists(专家)to study her rare disease．Dr．Howard, who o　　7　　 got a large glass of milk and a meal from the young woman, was called in for the treatment．He went down the hall of the hospital to her room when he heard the name of the town she came from．D　　8　　 in his doctor's uniform, he went in to see her．He recognized(认出)her quickly．He made up his mind to do his best to save her life and pay special a　　9　　 to the case．After a long struggle, the battle(战役)was won．The woman n　　10　　 these words when she paid the pill： “ Paid in full with one glass of milk… Dr．Howard Kelly…”