Fill in the blanks with "a" or "an" for each picture.

I'll solve this worksheet on articles by determining whether to use "A" or "An" for each noun. The rule is simple: use "An" before words that start with a vowel sound (a, e, i, o, u), and "A" before words that start with a consonant sound.

Let me go through each item:

1. cat - starts with 'c' (consonant sound) → A
2. elephant - starts with 'e' (vowel sound) → An
3. cake - starts with 'c' (consonant sound) → A
4. candy - starts with 'c' (consonant sound) → A
5. egg - starts with 'e' (vowel sound) → An
6. tree - starts with 't' (consonant sound) → A
7. eye - starts with 'e' (vowel sound) → An
8. ball - starts with 'b' (consonant sound) → A
9. book - starts with 'b' (consonant sound) → A
10. orange - starts with 'o' (vowel sound) → An
11. eraser - starts with 'e' (vowel sound) → An
12. dog - starts with 'd' (consonant sound) → A

The completed worksheet should look like this:
1. A cat.
2. An elephant.
3. A cake.
4. A candy.
5. An egg.
6. A tree.
7. An eye.
8. A ball.
9. A book.
10. An orange.
11. An eraser.
12. A dog.