So little ______ about mathematics that the lecture was completely beyond me.

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问题 So little ______ about mathematics that the lecture was completely beyond me.

选项 A、I know
B、I knew
C、do I know
D、did I know

答案D

解析 考倒装。“so+形容词或副词+that”结构通常引起部分倒装。故A和B不对,C项do I know的时态与本题不符,只有D符合题意。
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