Put in "a/an" or "some" where necessary. If no word is

Put in "a/an" or "some" where necessary. If no word is necessary, put "no article".
Write down the answers with comma (,).

1. I've seen ___________ good films recently.
2. What's wrong with you? Have you got __________ headache?
3. I know a lot of people. Most of them are ____________students.