不少于80个单词。Lily is a high school student. She wants to be a professional actress. As a volunteer ， she often volunteers her time。
☆美国英语母语人士点评:Lesson is normally what you're studying IN class， and class is just used to talk about the actual course you're taking. Lesson通常是指你在课堂上学习的内容，class只是用来谈论你所上的实际课程。
