-Did you remember to give Mary the money you owed her?

-Yes, I gave it to her ___ I saw her.
A.while B.the moment C.suddenly D.once
请高手给个确切的答案，再讲下其中的语法知识，谢谢，我将感激不尽！！！

Did you know _______? did you know -----did you------your homework Whai did you go when did you do和what did you do 区别 where did you graduate?还是where did you graduate from? why did you leave me Did you see the scenery ( )? Which one did you choose? Did God make you ?是什么意思