【正确答案】:
IDIOMS OF THIS CLASS HAVE A NOUN AS THE KEY WORD IN EACH AND FUNCTION AS A NOUN IN SENTENCES.
【题目解析】:Idioms of this class have a noun as the key word in each and function as a noun in sentences.
IDIOMS OF THIS CLASS HAVE A NOUN AS THE KEY WORD IN EACH AND FUNCTION AS A NOUN IN SENTENCES.