阅读下面材料,根据要求完成。 Anna lived on the side of a valley in Australia. Although she was poor, she was always helpful. One winter, there was a very big flood, and a lot of houses were washed away. Anna’s house was high enough to escape the flood. So, when the water had disappeared, here house was not damaged. However, Anna’s house was quite small and there were only two little bedrooms. Her husband died of illness when their four children were very young. But Anna shared her house with one of the families that had lost everything in the flood until it was possible for them to rebuild their own house. Anna’s friends were very puzzled when they saw Anna do this. They could not understand why Anna wanted to give herself so much more work and trouble when she had so many children to support. Life would be even harder when another family joined them. “Well,” Anna explained to her friends, “ 30 years ago, a woman in the town where I then lived in Germany found herself very poor, because her husband had been killed in the war, and she had a lot of children, as I have now.” The day before Christmas, the woman said to her children, “We won’t have much for Christmas this year, so I am going to get only one gift for all of us and I am sure we will all be glad to have it. Now I’ll go and get it.” She came back with a little girl who was even poorer than they, and who had no parents. “Here is our gift,” she said to her children. “The children were very excited and happy to get such a gift. They welcomed the little girl, and she grew up as their sister. I was that Christmas gift.”