1. 汽车   car   bus   helicopter   bicycle   Hint Half-n-half Clue   2. 小船   helicopter   taxi, cab   limousine   boat   Half-n-half Clue   3. 自行车   airplane   bicycle   boat   car   Half-n-half Clue   4. 大型高级轿车   motorbike, motorcycle   boat   bicycle   limousine   Half-n-half Clue   5. 摩托车，摩托车   van   motorbike, motorcycle   bus   car   Half-n-half Clue   6. 船   boat   ship   helicopter   ferry   Half-n-half Clue   7. 火车   helicopter   car   train   bicycle   Half-n-half Clue