【題目】It's said that________of the water around the world________polluted.

A.two thirds; isB.two thirds; hasC.two third; areD.two thirds; have

【答案】A

【解析】

句意：據(jù)說世界上三分之二的水被污染。

考查分?jǐn)?shù)表達(dá)法。分?jǐn)?shù)表達(dá)法——分子用基數(shù)詞，分母用序數(shù)詞，分子大于1的時(shí)候，分母要加s，故排除C項(xiàng)；且根據(jù)句意可知，句子應(yīng)為一般現(xiàn)在時(shí)的被動(dòng)語態(tài)，其結(jié)構(gòu)為be+done，故排除B、D項(xiàng)；另外分?jǐn)?shù)做主語時(shí)，句子的動(dòng)詞單復(fù)數(shù)要根據(jù)分?jǐn)?shù)后所接的名詞來確定，本句中water是不可數(shù)名詞，所以動(dòng)詞應(yīng)為單數(shù)，故排除C項(xiàng)，故選A。

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