单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级Unit 1 Public signsThe First Periodsign标志public sign公共标志What does this sign mean(意思是)It means No smoking.smoke(吸烟) smoking It means you shouldnt smoke.should

Good or bad of smokingHand Wang 091119 Class JJLU UniversityOctober 19 2011 Good or bad of smoking At present smoking is bing a widespread habit all over the world. Issue