Tile student said there were a few points in the essay he ______ impossible to comprehend.

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问题 Tile student said there were a few points in the essay he ______ impossible to comprehend.

选项 A、has found
B、was finding
C、had found
D、would find

答案C

解析本句主句是过去式，而从句的动作发生在主句动作之前，所以从句用过去完成式，即had found。

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专业英语四级

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