【題目】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:據(jù)說世界上三分之二的水被污染了。two thirds是三分之二,分子用基數(shù)詞,分母用序數(shù)詞,分子大于一的時(shí)候,分母要加s,因此AB兩個(gè)選項(xiàng)分?jǐn)?shù)的構(gòu)成不對(duì),先排除。這個(gè)分?jǐn)?shù)修飾了后面的名詞water,是不可數(shù)名詞,故謂語動(dòng)詞用單數(shù),選C。

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