of the students in our class are from the north.A. Two ninethB. Two ninthC. Two ninthsD. T

问题补充：

of the students in our class are from the north.

A. Two nineth

B. Two ninth

C. Two ninths

D. Two nineths

答案：

A. Two nineth

B. Two ninth

(答案→)C. Two ninths

D. Two nineths

解析：

句意：我们班2/9的学生来自北方。分数的表达：分子用基数词，分母用序数词，分子大于1，分母用复数。2/9应该是two ninths ,序数词“九”应是ninth .故选C。