问题：
Facing the economic depression, every possible means ______ this year to save the company
from going bankrupt.
[ ]
A. has been tried
B. has tried
C. have been tried
D. have tried
Facing the economic depression, every possible means ______ this year to save the company
from going bankrupt.
B. has tried
C. have been tried
D. have tried
from going bankrupt.
[ ]
A. has been tried B. has tried
C. have been tried
D. have tried
参考答案：