SORU: paragrafı uygun şekilde tamamlayan ifadeyi bulunuz
One of the world's busiest waterways is the Rhine. The river is navigable for almost 1000 km from the North Boa to Switzerland. ……… , and canals were built to link the Rhine with other major rivers. It is now possible to cross Europe from the Black Sea to the North Sea, or from the Baltic to the Mediterranean by river and canal.