试题题干
Translate the following sentence into Chinese.
By dumping sewage and chemicals into rivers lakes, we have contaminated our drinking water.
参考答案
试题解析
考点：dump 倾倒，丢下；sewage and chemicals 污水和化学制品；drinking water 饮用水。
句子结构：By dumping···为原因状语，主句为we have contaminated our drinking water.