目标 1. learn about png and jo’s work in png as a volunteer teacher. 2. learn how to read between lines and find the positive and negative aspects of doing something. 重点 comprehend the passage completely by knowing logical relations between facts and reasons. 二次备课难点 master the reading some skills 自主学习 1. asking-and-answering activity: 1). what does the word “volunteer”mean? 2) translate the following sentences. give roses to others and the lasting fragrance will remain in your hand. if everybody offers a little love, the world will become more beautiful. each contribution- no matter how small it is,- can make a big difference.