of the students in this class are girls.A. One five B. One fifth C. First five

问题补充：

of the students in this class are girls.

A. One five B. One fifth C. First five

答案：

解析：句意：这个班五分之一的学生是女生。考查分数词的用法，分子用基数词，分母用序数词。故选C。

考点: 考查数词的用法。

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