Idiom types like idioms nominal in nature,idioms adjectival in nature,and idioms verbal in nature are classified according to ______。
A、lexical functions
B、grammatical functions
C、contextual functions
D、cultural functions
【正确答案】：B
【题目解析】：Chapter 9 By the criterion of grammatical functions,(语法功能) idioms can be classified into five groups.
