一、阅读理解

　　第1题：

　　There is a senseless notion that children grow up and leave home when they’re 18, and the truth is far from that,” says sociologist Larry Bumpass of the University of Wisconsin. Today, unexpected numbers of young adults are living with their parents, “There is a major shift in the middle class,” declares sociologist Allan Schnaiberg of Northwester University, whose son, 19, moved back in after an absence of eight months.