Ex 2: Use the prepositions where necessary to complete the text. Russia is the largest country ________ the world but ________ the same time its population is smaller than in some other countries, China for example. Our country stretches ________ the Baltic Sea ________ the Pacific Ocean. There it borders ________ China and Japan. The largest river ________ Russia is the Volga. It flows ________ the Caspian Sea. A lot of old Russians cities lie ________ it. The chain mountains ________ the Pacific Coast are not very high. Russia is one of the greatest countries of the world and we are proud ________ it.