About of the students in Grade Nine this year were born in the .
A. three five; 1996.
B. three fifths; 1990s
C. third fifth; 1997.
D. third fifths; 1990s
网友回答
A. three five; 1996.
(答案→)B. three fifths; 1990s
C. third fifth; 1997.
D. third fifths; 1990s
解析：分数的构成为分子用基数词，分母用序数词，分子如果大于1，则分母序数词一般都用复数形式，故用排除法只能选B项。