_____ three influenza type A virus subtypes（子类型） have been found in pigs．
#27191
A
By far
B
As far as
C
So far
D
Till far
推荐题目
He was willing to help me ,and expected nothing________ .
#25485
A
In addition
B
In return
C
By chance
D
By turns
Though many of the heavy smokers have realized the serious effect that smoking has ______ their health, they continue to smoke instead of ______.
#26930
A
for; giving it up
B
on; quitting
C
to; abandoning
D
on; leaving
Jack, what’s your main reason for choosing one restaurant ______ another?
#25220
A
from
B
over
C
on
D
by
__________ win the most gold medals in the 2012 Olympic Games, the Chinese athletes are busy training.
#26167
A
In order to
B
In order that
C
So as to
D
So that