Вставьте предлоги. 1) susan is proud her parents. 2) i can not understand what you are saying if you all talk the same time. 3) the usa borders canada the north. 4) the volga flows the caspian sea. 5) he lay down the floor. 6) russia stretches the pacific ocean the baltic sea. 7) there is a river lying the valley. 8) the colorado flows south. 9) the urals are a chain mountains situated europe and asia.