(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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The field research will take Joan and Paul about five months; it will be a long time ____ we meet them again.
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A
after
B
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_A container weighs more after air is put in, ____proves that air has weight.
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as
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that
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Energy, passion and a burning desire are, you see, ________ true learning takes.
#30345
A
that
B
what
C
how
D
which