after和when的区别

题目

after和when的区别
The girl had a short rest ahd did her homework____she reached home.
A.after B.before C.when D.since
为什么?

答案

在英语中比较短暂的先后应该用when 而不是after,只有之后很长一段时间,或
者特别强调次序的时候才用after