There is no simple answer, _____ is often the case in science.
#76496
A
as
B
that
C
when
D
where
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For many cities in the world, there is no room to spread out further, ______ New York is an example.
#75480
A
for which
B
in which
C
of which
D
from which
Two years later, her father disappeared, never to be _________ again.
#76897
A
heard from
B
hear about
C
hear of
D
heard out