[题目]Researchers claim the first proof that getting a regular eight-hour sleep every night makes a real difference to our health.A. findingB. having foundC. to findD. to have found 题目和参考答案——青夏教育精英家教网—

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【题目】Researchers claim ________ the first proof that getting a regular eight-hour sleep every night makes a real difference to our health.

A. findingB. having found

C. to findD. to have found

【答案】D

【解析】

考查非谓语动词。句意：研究人员称，他们发现了第一个证据，证明每晚有规律的八小时睡眠对我们的健康有很大的影响。claim to do表示“声称做某事”，find发生在claim之前，应该用不定式的完成式，故D项正确。

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