Помогите пожалуйста с английским и артиклями.

Поставьте артикли a (an), the перед существительным, где нужно. В скобках для каждого предложения напишите пояснение, почему поставили тот или иной артикль, также поясняете причину отсутствия артикля.

1. … St Pauls’s Cathedral is … biggest church in … Britain.
2. Let’s go to … South of … England.
3. We bought … new dress. …dress is blue.
4. Washington is … capital of … USA.
5. Would you like … cup of coffee?
6. Sir W. Churchill was … famous politician.
7. He would like to visit …Red Square.
8. …Serovs are our friends.
9. … Volga runs into … Caspian Sea.
10. … Pacific Ocean is very deep.
11. … Kazbek is the highest peak of … Caucasus mountains.
12. I have never been to … Lake Onega.
13. … Washington is the capital of … United States.
14. … Europe and … America are separated by … Atlantic Ocean.
15. … Nile flows to … Mediterranean Sea.
16. There are small islands in … Pacific Ocean.
17. … Hymalayas are the highest mountains in … Asia.
18. … Lake Baikal is the deepest lake in the world.
19. … Glasgow is one of the biggest cities in … United Kingdom.
20. … Red Sea is between … Africa and … Asia.