——I still haven't thanked Aunt Lucy for her present.——It's time you ( )请问这里为什么填did?

——I still haven't thanked Aunt Lucy for her present.——It's time you ( )请问这里为什么填did?
——I still haven't thanked Aunt Lucy for her present.
——It's time you ( )
请问这里为什么填did?

——I still haven't thanked Aunt Lucy for her present.——It's time you ( )请问这里为什么填did?
It's time 后面从句用过去时,固定用法,属于虚拟语气

It's (high) time did something。这是固定用法，虚拟语气，其中high可以省去。还有一个句型It's time to do sth. 是一般进行时。在填空的时候要注意分析上下文。

过去时

因为所以，科学道理。用的是虚拟语气，但是固定语法。