A-A+
The drinking water was polluted by the toxins
问题详情
The drinking water was polluted by the toxins that had seeped into soils and groundwater.
A.Y
B.N
C.NG
参考答案
正确答案:A
解析:快速阅读一下题干,发现其中目的是找出污染原因。所以仍然是定位在第一个小标题下。找到第六段Toxins that have seeped into soils and groundwater have contaminated food,drinking water,and the air,说明饮用水、食物和空气都因为渗入到泥土和地下水里的毒素而受到污染。