摘要：
Presentation There are many famous successful people in the world , such as Bill Gates , Huo Ying dong ,Li Jiacheng, Ma Yun , Yu Min hong and so on. T 阅读全文
摘要：
课上内容（Lesson） 词汇（Key Word ） making meal clean house washing clothes washing dishes throw out trash friead mate: < partner clean horse < dirty habit n. 阅读全文