The professor could tell by the ________ look in Maria's eyes that she didn't understand a single

word of his lecture. [ ]

A. cold  

B. blank

C. innocent  

D. fresh

孔子云：“德之不厚，行之不远。”在当前社会转型期，存在很多为了一己私利践踏职业道德、社会公德等各种道德失范现象这说明（）。

A.价值观是正确的社会意识

B.正确价值观有助于引导社会良性运行

C.社会发展的规律是客观的

D.社会存在的变化决定社会意识的变化