题目内容：

in this area.over-----of the trees have been damaged in twenty the past twenty years
A two thirds B 60 percents C 60 th percent 选什么

优质解答

分数的表示法是分子用基数词,而2分子用序数词的复数.
百分数的表示法是 数+percent
答案选择A,无C的用法.