2012—2013英语必修4人教版新课标unit 4同步
学案（using language） period three using language 1 the most universal facial expression is,of course,the smile—its function is to show happiness and put people at ease.(p30) 拓展归纳 ease sb. of sth.减轻某人的痛苦、负担等 at ease安适；不拘束 ill at ease(因不安而)心神不宁 take one’s ease休息，轻松一下 with ease容易地
