Unit 9 When was it invented? Section B 1a -2c

人教版九年级暑假 Unit 6 When was it invented Section A 讲义（含答案）

Unit 9 When was it invented?单元学案

Unit 9 When was it invented?（Section A） 教案

9年级英语人教版Unit 6 When was it invented？ Section B 学案（无答案）

九上英语Unit 6 When was it invented？ Section B 课时练习（含答案）

新目标（Go for it）版九年级全Unit 6 When was it invented？Section B 2a-2d 原创教案