Our class is made up of 54 students, are girls.
A. of which two-fifths
B. of whom two-fifths
C. two-fifth of which
D. two-fifth of whom
网友回答
A. of which two-fifths
(答案→)B. of whom two-fifths
C. two-fifth of which
D. two-fifth of whom
解析：定语从句。五分之二 two-fifths 排除C,D
先行词为students 所以选B