Unit 1ClassroomLesson 1desk 桌子chair 椅子blackboard 黑板on: 在 ... 上面 in ：在 ... 里面under: 在 ... 下面Let’s practice!Put your schoolbag under the desk.Put your schoolbag under the desk.Put your schoolbag on the desk.Put your schoolbag on the desk.Put your book in the schoolbag.Put ...
