Помогите с артиклями.Заранее спасибо)

1. Go to the table and sit down please.
2. Can I ask you a question?
3. How far is your hotel from there?
4. What is the best dish in a menu?
5. What is the name of this professor?
6. Petrovs have two children: a boy and a girl.
7. What did you have for dinner?
8. Will you have a cup of tea?
9. Usually we go to school at eight o'clock in the morning.
10. My brother is an artist by profession.
11. What a fine day it is today!
12. What can you recommend for the first course?
13. The official name of our country is the Russian Federation.
14. The moon is bright this night.
15. I go to school but my elder sister goes to the college.