Unit 13 We’re trying to save the earth 语法知识 课件(共24张PPT)

Unit 13 We’re trying to save the earth. Section A（3a-4c）课件 (共15张PPT)

Unit 13 We're trying to save the earth! Section A (3a－4c)课件(共62张PPT)

Unit 13 We’re trying to save the earth！Section A (1a-2d) 课件（30张PPT）

Unit 13 We’re trying to save the earth! Section A Grammar Focus.（共32张PPT）

Unit 13 We’re trying to save the earth！Section A 2a-2d 课件(共44张PPT，内嵌音频)

Unit 13 We’re trying to save the earth! 单元巩固与复习 课件（共25张PPT）