| Answer | Crossword Clue |
|---|---|
| ROMANIA | The Danube flows along its southern border |
| LAOS | The Mekong flows along its border |
| IDAHO | The Snake flows along much of its border with Oregon |
| OTTAWARIVER | It flows along the Ontario-Quebec border |
| ILLINOIS | The Ohio River forms its southern border |
| IND | The Ohio R. forms its southern border |
