1. 汽艇   jet plane   monorail   motorboat   subway   Hint Half-n-half Clue   2. 路面电车，电车   scooter   airliner   kayak   streetcar, tram   Half-n-half Clue   3. 喷气机   raft   jet plane   breakdown van, tow-truck   motorboat   Half-n-half Clue   4. 地铁   monorail   subway   pickup truck, pick-up van   scooter   Half-n-half Clue   5. 班机   breakdown van, tow-truck   sailboat   cruiser   airliner   Half-n-half Clue   6. 故障搬运车，拖曳卡车   yacht   breakdown van, tow-truck   airliner   monorail   Half-n-half Clue   7. 独木舟   canoe   jet plane   streetcar, tram   pickup truck, pick-up van   Half-n-half Clue