Unit 9 Communication单元词句梳理单元必背语法1._ he arrived,he knew there would be many difficulties.在他到达之前，他就知道会有许多困难。2.One morning,_ Sam was walking by a group of students,he smiled at them.一天早上，当萨姆走过一群学生时，他朝他们微笑。Beforeas3._ Sam wasnt able to say much in French,everyone smiled and laughed.尽管萨姆不会用法语说太多，但每个人都笑了。Although
