On what date did the house catch fire? The house caught fire on ______, 1982.

A house in New York caught fire on Christmas Eve, 1982. The woman who lived in the house was already in her eighties.  Because she was in poor health, she had trouble in walking even when things were fine. Her house was burning around her, but she was unable to go anywhere. The smoke made it difficult for her to breathe. Fire fighters searched through the house. They started to put the fire out. But they didn’t know that the old woman was still inside. A man dressed like Father Christmas was passing by. He was on his way to give gifts to poor families. As soon as he heard the old woman’s cry, he ran into the burning house. After a while, he rushed out with the old woman on his back and carried her to safety. Ten minutes later, the house fell down.
16: On what date did the house catch fire?
17: Why did the old woman have trouble in walking?
18: Who put the fire out?
19: Whom was the man going to give the gifts to?
20: What happened to the house at last?