通读下面短文，掌握其大意。然后在各小题所给的四个选项中，选出一个最佳答案。
Mrs. Yuan is a writer. She's 1 and often helps the poor person. It was very cold one snowy morning. On the way to her office, she saw an old man 2 on the ground. She came to him and help him to 3 and bought some porridge and bread for him. The old man ate up the food quickly and 4 her very much. Then she asked. “Where do you live, Grandpa?”
“I have no 5 madam,” said the old man. “ I have to sleep outside 6.”
“How old are you?” “Ninety-two.” Mrs Yuan became 7 and went on asking, “Why not live in the old people's house?” 8 I have a son,” said the old man. “they've 9 admitted(接纳) a person who has children.”
“Do you have any children?”
“Yes,” answered the old man. “I have a son.”
“Where is your son, then?”
“He has no children, 10 the old people's house admitted him.”
“It's unfair!” said Mrs. Yuan. She overcame several difficulties and at last helped him to live in the old people's house.
