Teachers have to constantly update their knowledge in order to maintain their professional ________．
A.consequence
B.independence
C.petence
D.intelligence
网友回答
C解析本题考查名词辨析。句意：教师要不断地更新他们的知识以便保持专业上的称职。 consequence后果，结果；independence独立；petence能力，胜任，称职；intelligence智力,智慧; 理解力。