file:Lesson 24：It could be worse 不幸中之万幸.pdf file:Lesson 23：A new house 新居.pdf file:Lesson 22：A glass envelope 玻璃信封.pdf file:Lesson 21：Mad or not 是不是疯.pdf file:Lesson 20：One man in a boat 独坐孤舟.pdf file:(3)Lesson 19：Sold out 票已售完第3段.mp4 file:Lesson 18：He often does this! 他经常干这种事！.pdf file:Lesson 16：A polite request 彬彬有礼的要求.pdf file:Lesson 14：Do you speak English你会讲英语.pdf file:Lesson 13：The Greenwood Boys 绿林少年.pdf