139. The extraordinary diary of William Lyon Mackenzie King, prime minister of Canada for over twenty years, revealed that this most bland and circumspect of men was a mystic guided in both public and private life by omens, messages received at seances, and signs from heaven. A. that this most bland and circumspect of men was a mystic guided in both public and B. that this most bland and circumspect of men was a mystic and also guided both in public as well as C. this most bland and circumspect of men was a mystic and that he was guided in both public and D. this most bland and circumspect of men was a mystic and that he was guided in both public as well as E. this most bland and circumspect of men to have been a mystic and that he guided himself both in public as well as 这道题的正确答案很容易找出来，不过有个问题还是很让我头疼： this most bland and circumspect of men 的中心词是什么？是bland and circumspect么？形容词可以做主语么？如果most band and circumpsect 是主语那么为什么谓语是单数was? 若不然着是一个倒装的句子么？主语是a mystic?