题目内容

________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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