问题补充:
of the students in our school are boys.
A. Second-threes
B. Two-third
C. Second-twos
D. Two-thirds
答案:
A. Second-threes
B. Two-third
C. Second-twos
(答案→)D. Two-thirds
解析:句意:我们学校三分之二的学生是男生。在英语中,分数的分子用基数词,分母用序数词,分子大于一,分母用复数,所以三分之二是Two-thirds。故选D。