They overcame all the difficulties and fulfilled the plan ten days ahead of schedule, ______was something we had not expected.

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问题 They overcame all the difficulties and fulfilled the plan ten days ahead of schedule, ______was something we had not expected.

选项 A、that
B、this
C、what
D、which

答案D

解析 分析句子结构可知,本句为非限制性定语从句,引导词指代前面整个句子的内容。四个选项中只有which合适,故选D。
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本试题收录于: 英语题库普高专升本分类
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