Which of the following is NOT true about the definition of a word?
A、word is a sound unity.
B、word is a unit of meaning.
C、word is the smallest form of a language.
D、word is a form that can function alone in a sentence.
【正确答案】：C
【题目解析】：该题考查的是Word这个词的定义，课本第7页上有对于对于词汇定义的总结，提到四条，是sound unity, 是a unit of meaning, 是form that can functional one in a sentence, 这三条跟A、B、D三项的内容一致，C选项中缺少一个词free, 因此，C选项是错误的。
