问题
选择题
They work day and night; however, _______ of the money they make goes to their so-called eldest brother.
A．four-fifth
B．four-fifths
C．four-five
D．four-fifths
答案
答案：B
这题考查分数的表达：分子用基数词，分母用序数词，如果分子大于一，分母用复数，五分之四就是：four-fifths 选B。