The story ——(it)is interesting,but it's a little difficult for children.

问题描述:

The story ——(it)is interesting,but it's a little difficult for children.

itself

itself
故事本身有趣,但对于孩子来说有点难以理解。

itself,反身代词,强调主语
故事本身是有趣的,但对孩子们来说有点难以理解.