It is very important for English teachers to have a knowledge of the theories of language.

问题补充：

It is very important for English teachers to have a knowledge of the theories of language.

A. fluency

B. accuracy

C. acquisition

D. punctuation

答案：

A. fluency

B. accuracy

(答案→)C. acquisition

D. punctuation

解析：考查名词：A. fluency 流利B. accuracy精确C. acquisition 获得D. punctuation守时，句意：对英语老师来说，了解语言学习的理论是很重要的。选C。