it和that的用法区别The cost is half as much as____used to be two years a_英语解答

it和that的用法区别
The cost is half as much as____used to be two years ago.
为什么用it而不能用that?

人气：413 ℃　时间：2020-02-05 09:29:19

解答

因为同样都是指the cost ,当第二次重复出现时就用代词it
句子的意思:现在的费用是两年前的一半