【題目】Evidence has been found through years of study_____children's early sleeping problem is likely to continue when they grow up.

A. why B. how C. whether D. that

【答案】D

【解析】

試題分析：考查同位語從句。句意：多年的研究已經(jīng)發(fā)現(xiàn)了證據(jù)，孩子早期的睡眠問題可能在長大了之后會繼續(xù)。通過分析句子結構，可知這個句子中包含一個同位語從句，且引導詞在同位語從句中不作任何成分，且沒有實際意義，故用that。選D。

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