Unit 1,My school,Introduce,Excuse me. Wheres the teachers office? Its on the second floor. OK. Thanks,Words,this s,指示代词，意思是“这个；这位”。用于一般疑问句“Is this.?”时，简略回答一定要用“it,eg：This is my teacher, Mr. Bao. 这是我的老师，Mr. Bao,小练习：选择正确答案补全句子。 -Is this ruler yours? -No， _. A. this isnt B. it isnt C. it is,B,Words,classroom 3,名词词组，意思是“3号教室”。区别：“Class 3”是3班的意思,eg：The art room is next to Classroom 2. 美术室挨着2号教室。 My brother is in Class 3, Grade 7. 我弟弟在七年级3班,小练习：选择正确答案补全句子。 The twins are in _ on the seco
