她是一名政坛新人，对许多议会程序一无所知。

She was a rookie politician and ___ignorant of many parliamentary procedures.

许多人仍然对气候变化的长期后果一无所知。

Many remain ___ignorant of the long-term consequences of climate change.

他发表了一番无知的评论，暴露了他对历史的完全缺乏了解。

He made an ___ignorant comment that revealed his complete lack of historical knowledge.