Vocabulary can refer to the total number of the words of a language, and it can stand for all the words used （ ）, e.g. Old English vocabulary, Middle English vocabulary and Modern English vocabulary.
A、in a given book
B、in a given dialect
C、by an individual person
D、in a particular historical period
【正确答案】：D
【题目解析】：词汇可以指一种语言的词汇总数，它可以代表某一特定历史时期使用的所有词汇，如古英语词汇、中世纪英语词汇和现代英语词汇。
