Evidence has been found through years of

问题选择题

Evidence has been found through years of study______ children’s early sleeping problem likely to continue when they grow up.

A．why

B．how

C．whether

D．that

答案

答案：D

题目分析：考查同位语从句：多年的研究已经发现了证据，孩子早期的睡眠问题可能在最大的时候会继续。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。