About the definition of "a word", which of the following is NOT true?（ ）
A、A word is the smallest free form of a language.
B、A word is a sound unity.
C、A word has a given meaning.
D、A word can be used freely in a sentence.
【正确答案】：A
【题目解析】：本题可从词的定义入手。选出表述错误的选项。词的定义包括：1.a minimal free form of a language（语言的最小自由形式） 2. a sound unity（一种声音的集合） 3. a unit of meaning（一个词是一个意义单位） 4. a form that has a syntactic function（一种句法功能的形式）。A选项表述错误，正确的表述应为：The smallest free form of a language is a morpheme. （语言最小的自由形式是语素。）The morpheme is the smallest meaningful linguistic unit of language, not divisible or analyzable into smaller forms. (语素是语言中最小的有意义的语言单位，不能分割或分析成更小的形式）。所以本题选A。
