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________of the chemical factories in their city _________pouring waste water into the river. It’s too dangerous.
A.Two fifths; areB.Two fifths; isC.Two fifth; areD.Two fifth; is
A

试题分析:英语中一般用基数词表示分数的分子,用序数词表示分数的分母。当分子是一时,分数的分母用单数形式,在表示分数时,当分数的分子大于一时,分数的分母要用复数形式。由分数修饰的主语后面谓语动词的数,和被修饰主语的单复数保持一致。句意:他们城市中五分之二的化工厂把污水注入这条河流。太危险了。结合语境可知选A。
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