The two major factors that cause changes in meaning are ______. ( )

A. historical reason and class reason
B.historical reason and psychological reason
C.class reason and psychological reason
D.extra-linguistic factors and linguistic factors
出自:信阳师范学院-英语词汇学

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块