(2013·陕西师大附中模拟)If we had taken such effe
问题:
(2013·陕西师大附中模拟)If we had taken such effective measures much earlier, the river ________ so seriously now.
A.is not polluted
B.would not be polluted
C.had not been polluted
D.would not have been polluted
(2013·陕西师大附中模拟)If we had taken such effective measures much earlier, the river ________ so seriously now.
A.is not polluted
B.would not be polluted
C.had not been polluted
D.would not have been polluted