【www.5ykj.com - 莲山课件】Unit 3 Let’s Go! 冀教版(三年级起点) 四年级上册 Lesson 17 I’m Lost! Greeting and free talk： 复习回顾 (1)Review the sentences: How do you go to school? I go to school by … (2) 做拍手游戏,Review the numbers:one to thirty. 话题导入 What is it? What colour is it?