问题补充：
If we had taken such effective measures much earlier, the fiver so seriously now.
A. is not polluted
B. would not be polluted
C. had not been polluted
D. would not have been polluted
答案：
A. is not polluted
(答案→)B. would not be polluted
C. had not been polluted
D. would not have been polluted
解析：可联系答案网客服索取此答案。
如果觉得《If we had taken such effective measures much earlier the fiver so seriously now.A. is no》对你有帮助，请点赞、收藏，并留下你的观点哦！
