教学目标与核心素养：
知识目标：To listen for specific information and understanding words in context.
能力目标：To express another person's life and why they are inspirational.
情感目标：To understand volunteers play an important role in social life.
教学重难点
教学重点：Students shall grasp -ed and -ing endings.
教学难点：Students may want to read slowly and understand every word when skimming.
课前准备：多媒体，黑板，粉笔
教学过程：
一、Pre-class
1. Greeting
2. Leading-in
