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    【题目】Evidence has been found through years of study_____children's early sleeping problem is likely to continue when they grow up.

    A. why B. how C. whether D. that

    【答案】D

    【解析】

    试题分析：考查同位语从句。句意：多年的研究已经发现了证据，孩子早期的睡眠问题可能在长大了之后会继续。通过分析句子结构，可知这个句子中包含一个同位语从句，且引导词在同位语从句中不作任何成分，且没有实际意义，故用that。选D。

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