___second longest river in___Europe is___River___.It starts in___Germany and flows though___Austria,___Hungary___,____Slovakia,___Serbia and Montenegro and ___Romania before it reaches___Black Sea

The_second longest river in__---_Europe is_the__River Danube. It starts in_---__Germany and flows though__---_Austria,__---_Hungary,___---_Slovakia,__---_Serbia and Montenegro and __---_Romania before it reaches the Black Sea