it has a long body it has a black heart.it wlaks on paper.it becomes shorter and shor-ter
问题描述：
it has a long body it has a black heart.it wlaks on paper.it becomes shorter and shor-ter
what's it?
用英文回答,
答
It's a black crayon.它是黑色的蜡笔
哦 原来是 pencil 啊哦