32. The investigation showed that the mistake was _______ part of the authorities.
A) on B) in
C) with D) for
出自:西安石油大学-大学英语2

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