Помогите вставить артикль там, где это необходимо.

Question

Europe is the second smallest continent in ...world and is home to one seventh of ...world's population. 
....longest river there is ...River Volga and....largest freshwater lake is ...Lake Lodoga in ...north-western ...Russia. 
....highest mountain peak is ...Mount Elbrus in ...Caucasus Mountains. ..Europe is bordered towards the north by ...Arctic Ocean. 
the south by ...Mediterranean Sea and ...Black Sea, the west by ...Atlantic Ocean andthe east by....Asia. ..Europeans are ...people who live in....Europe. ..association which has been formed to unite ...countries of....Europe is called ...European Union.

а почему перед River Volga нет артикля?

Юрий Пасичник · Accepted Answer

Уurope is the second smallest continent in THE world and is home to one seventh of THE world's population.
THE longest river there is - River Volga and THE largest freshwater lake is - Lake Lodoga in THE north-western - Russia.
THE highest mountain peak is - Mount Elbrus in THE Caucasus Mountains. - Europe is bordered towards the north by THE Arctic Ocean.
the south by THE Mediterranean Sea and THE Black Sea, the west by THE Atlantic Ocean and the east by - Asia.- Europeans are THE people who live in - Europe. THE association which has been formed to unite - countries of - Europe is called THE European Union.

http://www.inolang.ru/english/26.htm
http://www.rfcmd.com/index.php?option=com_content&view=article&id=565:2008-11-04-09-26-45&catid=18:methodology&Itemid=13