Question

"I still haven't thanked Aunt Lucy for her present." "It's time you ____"

A.do
B.did
C.had
D.would
这个题怎么选啊？It's time for sb. to do sth.不是吗？

Answer 1

这个是虚拟语气
It's （high）time sb. should do sth.(其中should 不能省略) 故A不正确
It's time sb. did sth. 由此判断B和C中有一个，did在此为省略句，用DID指代了感谢这件事。（自己理解，仅供参考）
It's time for sb. to do sth.
It's time for Sth.

Answer 2

B it's （high）sb. did sth.表示是某人该做某事的时候了