1、Stepthree:PresentationPlease open your books and turn to page 21, here is the unit we are learning. Unit 3 I’m more outgoing than my sister. Section B (2b). Step4:ReadingHereisatext.Pleasereaditquicklyandtellmethe main idea. 1.给学生两分钟时间,叫学生对文章进行快速阅读,用一句话概括出中心大意。