He is so young that he can't go to school.求同义句

He is so young that he can't go to school.求同义句
改为如此：He is __________ _____ _____ go to school.
注：《新编基础训练》英语（新目标）八年级上Unit9的一道题,本人觉得多了一个空,求证实.
哦，1L的我认为可以，等老师来研究吧，给他改去......谢谢各位