English lexicology is chiefly concerned with the basic ( )of wor

English lexicology is chiefly concerned with the basic ( )of words in general and of English words in particular. 
【正确答案】：THEORIES
【题目解析】：英语词汇学是一门理论性课程。它主要论述词汇学的基本理论，特别是英语词汇的理论知识。