Insert the articles a (an), the before the noun, where necessary.

Explanation:

Answers:

1. Ann has got two children: a boy and a girl. The boy's name is Steve. The girl's name is Susan.
2. I have got some pets: a dog and a cat. The dog is black and the cat is white.
3. What a clever dog! The dog can understand my questions.
4. What a lazy cat! The cat sleeps all day.
5. We bought a vase yesterday. The vase was very large.
6. I like the sun. The sun gives us light and warmth.
7. I like to see the stars. The stars are always beautiful.
8. The forth poem was the shortest.
9. A garden has no flowers.
10. I can see some birds in the trees. The birds are crows.