pen pencil colcor pencil ruler eraser book pencilbox pencil sharpener dictionary pencil case notebook exercise book knife school bag backpack
staplerpen钢笔 pencil 铅笔 colcor pencil彩色铅笔ruler 尺子eraser 橡皮擦 book 书本pencilbox铅笔盒pencil sharpener 削笔刀dictionary 字典 pencil case文具盒 notebook笔记本 exercise book 练习本 knife小刀school bag 书包 backpack 双肩背包stapler 订书机 computer 电脑