Complete these sentence using "a, an, some, any": He eats ... apple after his dinner

Complete these sentence using "a,an,some,any"
1. He eats________________ apple after his dinner.
2. Are there ________________ vegetable?
3. Would you like _______________ water, please?
4. Mrs Brown doesn't have _____________ childen.
5. ___________ _________ brothers do you have?