-- What did he say his stupid behavior?
-- He admitted having made a serious mistake.
A. in front of
B. in explanation of
C. in case of
D. in fear of
网友回答
A. in front of
(答案→)B. in explanation of
C. in case of
D. in fear of
解析：A. in front of：在……前面； B. in explanation of ：对……作出解释；C. in case of：遇到……的时候；D. in fear of：担心……、害怕……。题意：他对自己的行为作何解释？故B项正确。