According to the idiomaticity of idioms, idioms can be divided i

According to the idiomaticity of idioms, idioms can be divided into "true" idioms established at the upper end, semi-idioms in between and ( ) combinations at the bottom.
【正确答案】：REGULAR
【题目解析】：“真正”的习语位于顶端，在中间地带的是“半习语”，规则的组合处于末端。答案为regular。