Teachers have to constantly update their knowledge in order to maintain their professiona

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A. consequence
B. independence
(答案→)C. petence
D. intelligence
解析：句意：教师必须不断地更新自己的知识来保持专业技能水平。考查名词辨析。professional petence意为“专业技能”，符合句意。consequence意为“后果，结果”；independence意为“独立”；intelligence意为“智力”，均不符合题意。