Unit4 Don’t eat in class1、 rule n. 规则；规章2、 arrive v. 到达3、 (be) on time 准时4、 hallway n. 走廊；过道5、 hall n. 大厅；礼堂6、 dining hall 餐厅7、 listen v.
Why will people have robots in their homes in the future?eg:Ø She is going to lend us her book. 她打算把书借给我们。
