Unit 6 The secret to good health
本课时目标： 复习本课所学的单词、短语和句子； 学习并拓展一些有关健康生活的谚语； 会根据某类人的年龄特点或不良生活习惯，为特定他们制定健康海报，并用所学的语言进行描述。  
     Mr Li is not a doctor or a nurse, but he knows the secret to good health. He is 80 years old but looks only 60. He says you can do some simple things to stay healthy. First, get plenty of sleep, at least 8 hours each night, so you will feel good for the next day. Second, keep a good diet. Eat more vegetables and less meat. Don’t eat too much sweet or oily food. And drink  ...