In terms of complexity of sentences, sentence idioms can be divided into three types except（）.
A、simple sentence
B、declarative sentence
C、compound sentence
D、complex sentence
【正确答案】：B
【题目解析】：In terms of complexity they can be further divided into simple, compound and complex sentences. 就复杂性而言，句式习语能被进一步细分为简单句、复合句和复杂句。答案为B。
