Evdence has been found through years of study         children’s early sleeping problem are likely to continue when they grow up.
A．whyB．howC．whether D．that
D
此題考查名詞性從句的同位語從句�！巴ㄟ^好些年的研究，孩子們早期睡眠的問題在他們長大后很有可能會延續(xù)的證據(jù)已經(jīng)找到了�！焙缶淦鋵�(shí)就是對evidence的進(jìn)一步解釋，是名詞性從句里的同位語從句。故只能選that。
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