The big lake was contaminated with waste
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The big lake was contaminated with waste waters from nearby factories.
A:widened B:blackened C:polluted D:mixed
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答案：C
本句话的意思是：那个大湖泊被附近工厂的废水污染了。pollute：污染、弄脏，例如：The violent films pollute the minds of the young men.暴力电影毒害年轻人的思想。 widen：加宽、变宽，例如：The gap between income and expenditure has widened to 11 %．收入和支出之间的差额已扩大到11%。 blacken：使变黑，例如：The soldier blackened his face with charcoal．那名士兵用木炭把他的脸涂黑。mix:混合、使混合，例如：The painter was busy mixing his colours．画家在忙着调颜色。