Evidencehasbeenfoundthroughyearsofstudy

问题详情：

Evidence has been found through years of study ________ children's early sleeping problems are likely to continue when they grow up.

A．why  B．how  C．whether  D．that

【回答】

D　[考查同位语从句。分析句子结构可知，空格后面的部分是解释说明evidence的内容的，是evidence的同位语从句，从句中不缺任何成分，故选连词that。]

知识点：连词

题型：选择题