Question

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

why

how

whether

that

Answer 1

【答案】D

【解析】考查名词性从句。分析句子结构可知，空白处后面为句子主语“evidence”的同位语从句，在这一从句中，句意完整，不缺少成分，应该使用“that”作为引导词。因此，正确答案为D选项。