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:通過分析句子結(jié)構(gòu),可知這個句子中包含一個同位語從句,且引導(dǎo)詞在同位語從句中不作任何成分,且沒有實際意義,故用that。
點評:在復(fù)合句中充當同位語的名詞性從句稱為同位語從句。解答這類題,首先要確定從句是什么從句,然后依據(jù)相應(yīng)的語法規(guī)則答題。同位語從句中引導(dǎo)詞的確定,要看它在同位語語從句中作什么成分,有沒有什么實際意義。
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