标签：话题作文 话题 英语四级作文
字数：1200字
提要：SleepIt＇s clear that everyone needs to sleep. Most people rarely think about how and why they sleep, however. We know that if we sleep well, we feel rested. If we don＇t sleep enough, we often feel tired and irritable.It seems there are two purposes of sleep: physical rest and emotional and psychological rest. We need to rest our bodies and minds. Both are important in order for us to be healthy...