Which of the following is NOT one of the types of idioms?（ ）
A、Sentence idioms.
B、Idioms adverbial in nature.
C、Clausal idioms.
D、Idioms nominal in nature.
【正确答案】：C
【题目解析】：习语的分类包括：名词性习语 (idioms nominal in nature)、形容词性习语 (idioms adjectival in nature)、动词性习语 (idioms verbal in nature)、副词性习语 ( idioms adverbial in nature)和句式习语 (sentence idioms)。
