单选题 ______ to his research work, the professor cared little about any other things.

【正确答案】 B
【答案解析】[考点] 过去分词作状语
[解析] 此题是动词的过去分词在句子中作状语．表示原因。可以把它理解为省略的状语从句，即：As the professor was devoted to his research work…根据题意选B。