schoolbag 书 包,Chinese book 语文书,English book 英语书,math book 数学书,storybook 故事书,notebook 笔记本,A:Whats this,a math book,B:Its _,A:Whats this,an English book,B:Its _,A:Whats this,a notebook,B:Its _,A:Whats this,a notebook,B:Its _,A:Whats this,a story-book,B:Its _,A:Whats this,an English book,B:Its _,a 用于以辅音音素开头的单词前面。 （不是辅音字母） an 用于元音音素开头的单词前面。 （不是元音字母,Attention 注意,1.A:What this? B:Its a math book. 2.A:Whats this? B:Its an English book. 3.A:Wh
