When we reached the station,the train had not arrived,

题目

When we reached the station,the train had not arrived,
so we
A.had not needed to hurry 请问这个为什么不成

答案

didn't need to do表示：过去不必做某事,事实上也没做.
needn't have done表示：过去不必做某事,但事实上做了.
没见过had not needed to这种表达,
可以这样说
So we didn't need to hurry