完成对话
Son （ ）Mum.Where is my pencil sharpener?
Mom Your pencil case or your pencil sharpener?
Son ( )I want to sharpen my pencil.
Mom Is it in your pencil case?
Son ( )
Mom Is it on my book case.
Som I dont know.Oh,I put it in the drawer.
Mom ( )It is under a dictionaey in the drawer.
Son Yes,it is,( )