If we had taken such effective measures much earlier, the riverso seriously now._刷题宝

题干

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

上一题下一题 0.0难度选择题更新时间:2019-10-31 03:12:11

答案(点此获取答案解析）

B

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