【随堂优化训练】九年级英语全册 Unit 13 We're trying to save the earth！第1课时(Section A 1a－3b)课件.pptVIP

Unit13We'retryingtosavetheearth！第1课时(SectionA1a－3b)短语1．playapartin点拨playapartin意为“在……中起作用；扮演角色；参与……...