So little______about physics that the lecture was completely beyond me.

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问题 So little______about physics that the lecture was completely beyond me.

选项 A、I knew
B、did I know
C、I had known
D、had I known

答案B

解析此题中so表示程度，因此句子需要部分倒装。B和D都是倒装句，区别在于时态。

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GCT工程硕士（英语）

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