【正确答案】：
AS THE TERM SUGGESTS, ALL IDIOMS OF THIS CATEGORY ARE COMPLETE SENTENCES. THEY ARE MAINLY PROVERBS AND SAYINGS, INCLUDING COLLOQUIAL ISMS AND CATCHPHRASES. AS FAR AS SENTENCE TYPES ARE CONCERNED, THEY EMBRACE DECLARATIVE, INTERROGATIVE, IMPERATIVE AND EXCLAMATIVE SENTENCES. IN TERMS OF COMPLEXITY THEY CAN BE FURTHER DIVIDED INTO SIMPLE, COMPOUND AND COMPLEX SENTENCES.
【题目解析】：As the term suggests, all idioms of this category are complete sentences. They are mainly proverbs and sayings, including colloquial isms and catchphrases. As far as sentence types are concerned, they embrace declarative, interrogative, imperative and exclamative sentences. In terms of complexity they can be further divided into simple, compound and complex sentences.
