Whereas the rules of military service differs from country to country, I was wondering if someone could let me know which one of the following self-made sentences sounds more natural in this sense:
How many months do you do your military service in your country?
How long is your military service is your country?
How many months do you do your military service in your country?
How many months is your military service in your country?
I doubt if they are natural. They were what came to my mind to translate into English. How shall I bring it up?