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题目
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-Why does the Lake smell terrible? 
-Because large quantities of water       .  
A.have pollutedB.is being pollutedC.has been pollutedD.have been polluted

答案
D
解析
考查动词时态,语态和主谓语一致。根据前一分句可知所填动词表示过去发生的动作对现在产生的影响,时态用现在完成时,动词与主语是被动关系,用被动语态。主语是large quantities of water,其中心词是quantities,是复数,谓语动词用复数,选D。
核心考点
试题【-Why does the Lake smell terrible? -Because large quantities of water       .  A】;主要考察你对一般现在时等知识点的理解。[详细]
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