1. 出口结关   customs clearance   snack   vegetarian   meal   Hint Half-n-half Clue   2. 称   money exchange   weigh   excess   meal   Half-n-half Clue   3. 数字   restaurant   number   aircraft   customs officer   Half-n-half Clue   4. 快餐   luggage van   pilot   snack   cabin   Half-n-half Clue   5. 窗口   cabin   currency   window   meal   Half-n-half Clue   6. 兑换处   shop   money exchange   currency   number   Half-n-half Clue   7. 面包点心店   aircraft   pastry shop   snack   cuisine   Half-n-half Clue