The formation of new words by joining two or more stems is called ______. （ ）
A、clipping
B、compounding
C、acronymy
D、back-formation
【正确答案】：B
【题目解析】：本题考查第四章复合法的概念，复合法概念为：Compounding, also called composition, is the formation of new words by joining two or more stems。此外，根据四个单词的意思也很容易选出B。
