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______of the water_____polluted. We must try to protect our environment.

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

CTwo thirds; are D. Two thirds ; is

 

D

【解析】

试题分析:句意:三分之二的水被污染了,我们必须保护我们的环境。分数的表示是:分子用基数词,分母用序数词;分子超过一,分母要用复数形式。Water做主语,谓语动词用单数。故选D

考点:考查分数和主谓一致

 

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