So little did l know about physics that the lecture was completely ------me

So little did l know about physics that the lecture was completely ------me

题目
So little did l know about physics that the lecture was completely ------me
A.,on B.above C.over D.to
答案
选B.句意:我对物理知之甚少,因此我对这个讲座是一窍不通.
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