Most American families are smaller than those in other countries. Usually there are one or two parents and one or two children in each American family. Children in the USA will leave their parents when they grow up. They want to find better jobs, so they usually live far away from their parents. They often write to their parents or call them. And they go to visit their parents during their holidays. Parents will ask their children to do some work around their house. In many families children will get money for doing some housework so that they can learn to make money for their own. Parents usually let their children choose their own jobs. Americans think that for young people it is important to decide on their lives by themselves. From the passage we can know that children in America  _
leave their parents when they grow up often spend holidays at their parents' house sometimes look for jobs for their own parents often call or write to their parents for money.