Unit6 When was it invented 综合测试卷（含答案+听力书面材料）

人教版九年级全册 Unit 6 When was it invented？ 练习题（含解析）

Unit 6 When was it invented 单元检测（含解析）

人教版八年级上册 Unit 6 When was it invented？ 背诵 默写 (含答案)

Unit 6 When was it invented 单元检测题（含解析）

Unit 6　When was it invented 单元测试卷（含听力原文+答案）

人教版九年级全一册 Unit 6 When was it invented？单元综合检测卷（含解析，无听力原文及音频）