—Sorry, sir. I made a mistake again．
— Practice more and you will do better．
A. Never mind．
B. I'm not sure.
C. You're wele．
D. Don't mention it．
网友回答
(答案→)A. Never mind．
B. I'm not sure.
C. You're wele．
D. Don't mention it．
解析：Never mind．没关系，不要记在心上；I'm not sure. 我不确定；You're wele．不客气；Don't mention it．不用介意。句意：抱歉，先生。我又犯错了。结合下文：多练习你就会做得更好。故选A。