1. 帆船   subway   raft   sailboat   streetcar, tram   Hint Half-n-half Clue   2. 地下鉄   scooter   sailboat   subway   monorail   Half-n-half Clue   3. 筏   raft   airliner   streetcar, tram   monorail   Half-n-half Clue   4. 単軌鉄道   monorail   sailboat   raft   airliner   Half-n-half Clue   5. スクーター   sailboat   scooter   monorail   raft   Half-n-half Clue   6. 定期旅客機　   subway   monorail   airliner   streetcar, tram   Half-n-half Clue   7. 路面電車   sailboat   subway   scooter   streetcar, tram   Half-n-half Clue