Complete the sentences with article where it is necessary.
Fill "the" or "NA"
1.  ...United Kingdom consists of  ...Great Britain and  ...Northern Ireland. 2.  ...Pacific Ocean is very deep. 3.  ...Red Sea is between  ...Africa and  ...Asia. 4.  ...Russia is washed by...  Arctic Ocean. 5. Last year I was in  ...USA and saw...  Niagara Fall. 6. This winter we are going to ski in ... Urals. 7.  ...Lake Baikal is the deepest lake in the world. 8. There are many popular skiing resorts in ... Alps. 9.  ...Everest is the highest peak on the Earth. 10. Some of my old friends live in ... UK.