_____ 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
. The chickens will provide us _______ feathers, ______ we can make use for cleaning the table and benches.
#26866
A
ith; with
B
ith; of which
C
f; which
D
f; from which
He made one big mistake, and , ______, lost his job.
#26786
A
in a word
B
in fact
C
at last
D
as a result
______ being fun and good exercise ,swimming is a very useful skill.
#25945
A
Apart from
B
Except
C
Except for
D
Except that
I saw a woman running toward me in the dark.Before I could recognize who she was,she had run back in the direction____she had come.
#26178
A
of which
B
by which
C
in which
D
from which