听下面一段材料，回答第13至第16四个小题。 1. Why are the old people against living with their children? A. Their children’s houses are not big enough. B. They like to take care of themselves. C. They don’t want to trouble their children. 2. Why do only a part of them go to old people’s homes provided by the state? A. Their children don’t allow them to. B. There are not enough for them. C. Some of them don’t like such places. 3. What is the most difficult for politicians to solve the problem? A. There is not enough money. B. Many old people are against it. C. Few people support it 4. What problem are they talking about? A. Population problem. B. Family problem. C. Problem with the old