Exercise is good ______us.  
#47654
A
at
B
in
C
of
D
for
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I like all the other subjects________math.
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A
to
B
with
C
except
D
about
Some of them are _________ Chinese style.
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A
in
B
at
C
through
D
under
We couldn’t see the road clearly  _______ the heavy snow.
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A
because
B
because of
C
so
D
though