Most people in America live in small groups.More than a quar

Most people in America live in small groups.More than a quarter of homes in America have only one person in them.Some of these are old people,but some are people of twenty or thirty years old who would like to live alone.35% of homes have two people in them; another 17% have three people.15% have four people in them,and the others have five or more.
Many families in American are small.It is unusual for parents to have more than two children.When children are about eighteen or nineteen years old,some of them leave home,and they often go to different cities.Sometimes they can visit their parents only two or three times a year.
根据短文内容,回答下列问题.
1.How do most people in American live?
2.How many homes in America have only one person living in them?3.Do all the old people in American live alone?
4.How old are they when children go away from their parents‘home?
5.How often do the children visit their parent?