It is __that we should help those who have fallen behind in their studies 为什么填most important为什么不是 the most important

问题描述:

It is __that we should help those who have fallen behind in their studies 为什么填most important
为什么不是 the most important

the most important,不用the 的原因大概因为important在这里是作表语的,而不是做定语,当important修饰名次组成名词短语时候*时候most 前面应该加the的,不知道这个解释是否合理?