____ at the end of stems can modify the meaning of the original word and in many cases change its part of speech.
A.roots
B.prefixes
C.suffixes
D.free morphemes
出自:信阳师范大学英语语言学

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