I made a promise to myself __________ this year, my first year in high school, would be different.
A. whether
B. what
C. that
D. how
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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
I have no impression _________ he went home, perhaps by bike.
A. how
B. that
C. where
D. which
Information has been put forward _________ more middle school graduates will be admitted into universities.
A. whild
B. that
C. when
D. as
We'll discuss the problem _______ the sports meeting will be held on time.
A. that
B. where
C. when
D. whether