Do you know the year ______the Chinese Communist Party was founded?
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A
which
B
that
C
when
D
on which
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— No one can answer the question _______ we can complete the task in time, do you know? — Yes, and this is because we don’t know the way _______ the scientist used last time．
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A
whether; which
B
if; which
C
whether; in which
D
if; in which
I won’t change my belief _________ success comes to those who act．
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A
that
B
which
C
where．
D
how
He came here in the hope he could learn about the cause of the accident.
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A
which
B
how
C
that
D
what