Evidence has been found through years of study __________ children’s early sleeping problems are likely to continue when they grow up.
A．whyB．howC．thatD．whether
C

試題分析：句意為：孩子早期的睡眠問題在他們長大的時候似乎會持續(xù)的證據(jù)經(jīng)過幾年的研究已經(jīng)被發(fā)現(xiàn)了。所引導的從句是evidence的同位語句從句，解釋了evidence的內容，且后面的從句不缺少成份，無疑問的意思，故答案應為C。
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