unit1in class在上课stand up起立Mr先生sit down坐下please请open开;打开the这个;door门sorry对不起come in进来close关上;合上window窗,窗户blackboard黑板book书rubber橡皮dont=do not不listen to听parrot鹦鹉in class 在上课stand up 起立 Sit down ,please. 请坐下Please open the door. 请开门Please close the window请关窗户Im sorry对不起 come in 进来Please open the book. 请打开书Whats this? Its a rubber.这是什么? 它是一块橡皮Look at the blackbo