_______ words (closed class) include determiners, articles, auxiliaries, pronouns, prepositions, conjunctions.

You can use the following devices to make the main body coherent EXCEPT ______. A: repeated / rephrased terms B: modal auxiliaries C: transitional sentences D: expressions referring back or forward

What conclusion can be made based on the following observation?I did not go to New York. I will not go to New York. Did you go to New York? Will you go to New York?Why did you go to New York? Why will you go to New York? A: Do operates like auxiliaries do, so it can be treated as auxiliary verbs. B: Do is not as frequently used as auxiliary verbs do. C: Though do behaves like auxiliaries, they do not perform the same function. D: Auxiliary verbs can replace do in some cases.

绿色化学的十二条原则是什么？ A: 能量效率设计(design for energy efficiency) B: 催化(catalysis) C: 预防（prevention) D: 减少衍生物(reduce derivatives) E: 低毒化学合成（less hazardous chemical synthesis） F: 安全的溶剂和助剂（ater solvents and auxiliaries） G: 本身安全、能防止意外事故的化学(inherently safer chemistry for accident prevention) H:使用可再生原料(use renewable feedstocks) I:防止污染的快速分析(real-time analysis for pollution prevention) J:原子经济性（atom economy） K:设计安全化学品(designing safer chemicals) L:降解设计(design for degradation)

绿色化学的十二条原则是什么？ A: 预防（prevention) B: 原子经济性（atom economy） C: 低毒化学合成（less hazardous chemical synthesis） D: 设计安全化学品(designing safer chemicals) E: 安全的溶剂和助剂（ater solvents and auxiliaries） F: 能量效率设计(design for energy efficiency) G: 使用可再生原料(use renewable feedstocks) H: 减少衍生物(reduce derivatives) I: 催化(catalysis) J: 降解设计(design for degradation) K: 防止污染的快速分析(real-time analysis for pollution prevention) L: 本身安全、能防止意外事故的化学(inherently safer chemistry for accident prevention)