As to the subject, we have consulted the most professor who gave us explanation.
A. learning; content
B. learned; contented
C. learnt; contented
D. learn; content
网友回答
A. learning; content
(答案→)B. learned; contented
C. learnt; contented
D. learn; content
解析：考查词义辨析。learned 形容词，有学问的，contented 满意的，句意：关于这个科目，我们已经咨询了最有学问的教授，他会给我们满意的解释。所以选B。