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     of the students       boys in our class.

A.One fifth; are B.One fifths; are
C.First fifths; is D.One five; is

A

解析试题分析:句意:在我们班的学生中有五分之一是男孩。分析:考查分数的表示方法,分子用基数词,分母用序数词,如果分子超过一,分母要加s,明确第一项正确,同时学生是可数名词,因此be动词用are.故选A
考点:考查数词的用法。

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