1. Would you like a coffee?
(Use "a" because "coffee" is a countable noun in this context.)

2. I asked the waiter for some water.
(Use "some" with uncountable nouns like "water" in a polite request.)

3, An apple a day keeps the doctor away.
(Use "an" before a word starting with a vowel sound like "apple.")

4. I borrowed some books from the local library yesterday.
(Use "some" for countable nouns in affirmative sentences.)

5. Don’t add any more salt in the soup.
(Use "any" in negative sentences and questions.)

6. Is there a post office near here?
(Use "a" because "post office" is a countable noun.)

7. I want to drink some beer.
(Use "some" with uncountable nouns when you're offering or requesting.)

8. Are there any fruits left in the fridge?
(Use "any" in questions about countable nouns like "fruits.")

9. Some students in my class are foreigners.
(Use "some" for countable nouns in affirmative sentences.)

10. I don’t have any information about her.
(Use "any" with uncountable nouns in negative sentences.)