Which of the following statements is NOT true? （）

Which of the following statements is NOT true? （）
A、A word is the smallest 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】：本题考查词的定义。词的定义由以下几点构成：(1)语言的最小自由形式(2)语音集合体(3)意义单位(4)能在句子中单独起作用的形式。A选项应该表述为：a minimal free form of a language。故A选项符合题意。