Dumped waste might contaminate water supplies.

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问题 Dumped waste might contaminate water supplies.

选项 A、destroy
B、decrease
C、pollute
D、delay

答案C

解析 句意为:倾倒的垃圾可能污染供水。contaminate“污染”,四个选项:destroy“破坏,毁灭”;decrease“减少,降低”;pollute“污染”;delay“推迟”。
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