The student said there were a few points in the essay he ______ impossible to comprehend.[2007]

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问题 The student said there were a few points in the essay he ______ impossible to comprehend.[2007]

选项 A、had found
B、finds
C、has found
D、would find

答案A

解析 主句谓语动词为said,根据时态的呼应排除选项B和C。从句意上来判断,“他发现几点疑问”这一动作发生在他说话之前,不是说话之后,故使用过去完成式。
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