Alex has finally become an astronaut, __________all his family members think is his dream career.
#66920
A
which
B
who
C
that
D
whom
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Have you ever wondered ______ there are so many natural disasters across the world in 2010?
#69818
A
which it is that
B
what is it that
C
how it is that
D
why it is that
The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences．
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A
to which
B
with which
C
in which
D
for