The professor’s habitual air of ___ was misleading front, concealing amazing reserves of patience and a deep commitment to his students’ learning.
A. cordiality
B. irascibility
C. disorganization
D. conviviality
E. diffidence
F. exasperation
选 BF
翻译：教授素来给人一种易怒的印象，掩盖了他其实相当耐心，对弟子的学业也付出了很多心血。
重复题，11 / 50 第九题。
habitual 习惯性的，惯常的
air 在此不做空气、氛围解释，【MWC】outward appearance of a thing 外在印象，给人的印象
front 外表，样子
cordiality 诚恳，亲切，友好
irascibility 易怒，暴躁
disorganization 扰乱，混乱
conviviality 欢乐，联欢(吃喝)
diffidence 缺乏自信，羞怯
exasperation 恼怒，被激怒
