九年级英语全册 Unit 6 When was it invented Section A（1a2d）教案 （新版）人教新目标版
Unit 6 When was it invented? Section A，1a-2d一、Teaching Aims:1.to learn and to use new words heel
九年级英语全册 Unit 6 When was it invented Section A（1a2d）教案 （新版）人教新目标版九年级英语全册 Unit 6 When was it invented Section A（1a2d）教案 （新版）人教新目标版