Costs have been reduced ___20% over past year.
#28077
A
in
B
on
C
to
D
by
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The invention of artificial hearts marked a turning point in the battle heart disease.
#27040
A
among
B
for
C
against
D
between
—You must apologize________your sister________being so rude.—No way. It was her fault.
#25933
A
with；about
B
at；for
C
to；with
D
to；for
He likes novels very much , while I love science fiction _________ .
#27333
A
at peace
B
with care
C
in surprise
D
in particular