Words may fall into native words and borrowed words by（ ）.

Words may fall into native words and borrowed words by（ ）.
A、notion
B、origin
C、function
D、use frequency
【正确答案】：B
【题目解析】：本题考查本族词和外来词。As far as the origins of the words are concerned, English words can be classified into native words and borrowed words. 从词汇的起源来看，英语词汇可以分为本族词和外来词。notion：概念；origin：起源；function：功能；use frequency：使用频率。