问题
选择题
Evidence has been found through years of study ______ children’s early sleeping problems are likely to continue when they grow up.[ ]
A. why
B. how
C. whether
D. that
答案
答案：D
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Evidence has been found through years of study ______ children’s early sleeping problems are likely to continue when they grow up.[ ]
A. why
B. how
C. whether
D. that
答案：D