英语翻译

题目

英语翻译
It has a long body.It has black heart.It walks on paper.It becomes shorter and shorter.what's it.
It is clean when it is black.It is dirty when it is white.what"s it.

答案

这样东西很长,内芯是黑的,可以在纸上走.慢慢地,它就变短了.（铅笔pencil）
一样东西,它干净的时候是黑的,脏了就变白了.（黑板blackboard）