Being phrases or sentences, each idiom consists of more than one word, but each is a semantic _____. For example, till the cows come home means "forever" and functions as an adverb.
Being phrases or sentences, each idiom consists of more than one word, but each is a semantic _____. For example, till the cows come home means "forever" and functions as an adverb. 【正确答案】：unity
