Antonyms are classified on the basis of ______ opposition. （ ）
A、semantic
B、euphemistic
C、idiomatic
D、grammatical
【正确答案】：A
【题目解析】：本题考查第六章反义词Antonymy的相关概念的理解。反义词是根据词义的不同来划分，其概念指出：Antonymy is concerned with semantic opposition. Antonyms can be defined as words which are opposite in meaning，所以应该选择A
