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_____ of the water _____ polluted. We must try to protect our environment.

A. Two third; are  B. Two third; is   

C. Two thirds; are    D. Two thirds; is

 

D

【解析】

试题分析:句意:三分之二的水杯污染了。我们必须尽力保护我们的环境。分数的表达方法:分子基数词,分母序数词,分子大于一,分母加s。water是不可数名词,谓语动词要用单数。故选D。

考点:考查分数的用法。

 

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