The science of medicine, _____ progress has been very rapid lately, is perhaps the most important of all the science.
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A
all whose
B
all what
C
all that
D
all which
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We haven’t settled the problem of_______it is necessary for him to study abroad.
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A
that
B
whether
C
what
D
if
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
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A
that
B
as
C
so that
D
which
Sarah Brightman, ________ will fly to space in 2015, is the first woman to fly there in the field of music.
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A
who
B
that
C
which
D
whose