You can use "me" as the object of a sentence to answer a question.
When asked who's at the door, the answer, "Me." is the object of the sentence "It's me."; the "it's" or "it is" is implied.
Yes, you can use the keyword in your question.
you use i because you just aked a question saying do I use me or i. So you use i.
It really depends on the context of your question. You can use it anywhere.
I never question my authorities.
You just used it in a question.
You can do this when you are shouting your question.
answer my question answer my question
the First Amendment
it has to be able to be proven and use a question
you use which when you want to ask a question like (which one do you want?) and what when you want to ask a question like (whats your name) :p
You use a question mark (?) as the punctuation after the sentence or question you are asking.
You should use did.