(2013·莱州一中期末检测)He didn't expect that his parents could manage to know ________ is going on in his college life on the Internet.
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A
how
B
which
C
what
D
that
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As is reported, it is 100 years ________Qinghua University was founded.
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when
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before
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I’ve heard a whisper ______ David and Alice are going to get married.
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what
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which
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She had golden hair when she was a child, but_________ she got older and older, her hair went darker and darker．
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while
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The astronauts found that ______ the spaceship went further and further into space, it became more and more difficult to control its own movements.
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if
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till
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You must observe and gather information like Nicolaus Copernicus ________ you want more career advancement opportunities.
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A
or
B
because
C
unless
D
if