试题题干
A（）study of a language is concerned with the historical development of the language over a long period of time.
参考答案
正确答案：
试题解析
历时性研究关注的是语言经过一定时间阶段所发生的历史变化。
A（）study of a language is concerned with the historical development of the language over a long period of time.
历时性研究关注的是语言经过一定时间阶段所发生的历史变化。