He ( ) himself on his ability to speak four languages

A.proud
B.proudly
C.proud of
D.prided
出自:当代英语语法概论

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