精选优质文档-倾情为你奉上七选五巩固练习（一）What is a dream?For centuries, people have wondered about the strange places that they seem to visit in their sleep. 1 However, they have been valued as necessary to a persons health and happiness.Historically people thought dreams contained messages from God. It was only in the twentieth century that people started to study dreams scientifically believing that they tell about a persons character. 2 He believed that dreams allow a person to expre
