题目内容
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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