One day, Howard Kelly，a poor boy was sending newspapers door to door because he wanted to get some money to go on his schooling . He was so hungry that he decided to beg for a meal at the next house.
However, he felt nervous when a lovely young woman opened the door. Instead of a meal he asked for a drink of water. She thought he looked hungry so she brought him a large glass of milk. He drank it slowly, and then asked, “how much do I owe（欠） you?”
“You don't owe me anything,” she replied. “Then I thank you from the bottom of my heart.” With these words, Howard Kelly left that house.
Years later the woman became badly ill and was finally sent to the hospital in a big city. Dr. Howard Kelly, now famous, was called in. When he heard the name of the town she came from, a strange light filled his eyes. Immediately ,he rose and went down through the hospital hall into her room.
Dressed in his doctor's clothes, Dr. Kelly went into her room and recognized(认出） her at once. From that day on, he gave special attention to her, and decided to do his best to save her life.
At last the woman was saved. Dr. Kelly asked the business office to pass the final bill to him. He looked at it and then wrote something on the side. The bill was sent to her room. She was afraid to open it because she was sure that it would take the rest of her life to pay for it off. Finally she looked, and the note on the side of the bill caught her 
attention. She read these words:
“Paid in full with a glass of milk, Dr. Howard Kelly.”
Tears of joy flooded her eyes as she prayed silently,“Thank You,God. Your love has spread through human hearts and hands.”
1. The boy was sending newspapers door to door in order to _______.
A. continue his schooling B. become a famous doctor
C. thank the woman for her kindness D. support his poor family
2. Which is true about the boy and the woman?
A. He became too shy to ask her for a drink of water.
B. She thought he was not hungry but thirsty.
C. She wanted him to pay for the glass of milk.
D. She never thought he would save her life later.
3. After Dr. Kelly knew who the woman was, he _______.
A. began to take good care of her himself
B. told her she once gave him a glass of milk
C. made up his mind to try his best to save her
D. asked for her bill and paid for it off at once
4. The best title for this passage is _______.
A. A Warm-hearted Woman B. A Glass of Milk
C. The Final Bill D. A Famous Doctor