Помогите пожалуйста где нужно поставить артикль the английский

1. Last year we visited Canada and the United States.

2. Africa is much larger than Europe.

3. The South of England is warmer than the North.

4. We went to Spain for our holidays and swam in the Mediterranean.

5. Tom has visited most countries in Western Europe.

6. A friend of mine used to work as a reporter in the Middle East.

7. Next year we are going skiing in the Swiss Alps.

8. Malta has been a republic since 1974.

9. The Nile is the longest river in Africa.

10. The United Kingdom consists of Great Britain and Northern Ireland.