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【题目】It’s said that ______ of the water around the world ______ polluted.

A. two third; is B. two third; are C. two thirds; is D. two thirds; are

【答案】C

【解析】句意:据说世界上三分之二的水被污染了。two thirds是三分之二,分子用基数词,分母用序数词,分子大于一的时候,分母要加s,因此AB两个选项分数的构成不对,先排除。这个分数修饰了后面的名词water,是不可数名词,故谓语动词用单数,选C。

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