【正文】
ream, scientists say. Dreams take up about one quarter of our sleeping time. People have several dreams each night. Dreams are like short movies. They are usually in colour. Some dreams are like old movies. They e to us over again. That may be because the dreamer is worrying about something. Dreaming may be a way of trying to find an answer. Some people get new ideas about their work from dream. But often we can’t remember the dream. Dreams can disappear quickly from memory. Sometimes we wake up with a good feeling from a dream. Too much dreaming can be harmful. The more we sleep, the longer we dream. The mind is hard at work when we dream. That is why we may have a long sleep and still wake up tired. 1. The main idea of the story is that_______. A. people need to