课件39张PPT。Unit 4 Astronomy: the science of the stars 话题导入D D B 重点单词A C C 短语与句式A D B C A You are to wait here 难句分析thanks课件26张PPT。Unit 4 astronomy: the science of the starsA D A A D Thanks 课件10张PPT。Unit 4 Astronomy: the science of the stars 语法感知知识储备thanks
