The invention of artificial hearts marked a turning point in the battle       heart disease.
#27040
A
among
B
for
C
against
D
between
推荐题目
This picture looks beautiful ______.
#27089
A
at distance
B
at a distance
C
in the distance
D
in distance
  – How soon could they cover the distance?--- ____________.
#27595
A
For two hours
B
During the two hours
C
After two hours
D
In two hours