15 Баллов , Плиз помогите , Заблаговременно СПАСИБО :DPut in a/an

15 Баллов , Плиз помогите , Заблаговременно СПАСИБО :D
Put in a/an or some where necessary. If no word is necessary, leave the space empty.

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.

4) When I was __________ child, I used to be very shy.

5) Would you like to be __________ actor?

6) Do you collect __________ stamps?

7) What __________ beautiful garden!

8) __________ birds, for example the penguin, cannot fly.

9) I've been walking for three hours. I've got __________ sore feet.