It’s an international school of the students from foreign countries.A. two-third; areB.

问题补充：

It’s an international school,of the students from foreign countries.

A. two-third; are

B. second-thirds; is

C. two-thirds; are

D. two-three; is

答案：

A. two-third; are

B. second-thirds; is

(答案→)C. two-thirds; are

D. two-three; is

解析：句意：这是个国际性学习，三分之二的学生来自国外。分数的表示，分子用基数词，分母用序数词，如one third三分之一；当分子大于一时，分母用复数形式，如two-thirds; students是复数，所以be用are，故选C。