根据句意及首字母提示补全单词。 1. There's a s _____ 'When in Rome, do as the Romans do. ' 2. W_____ like traveling when they are free. 3. In China, dinner is usually s_____ at around 12 o'clock. 4. A year l_____, he went to college. 5. C_____up, perhaps we'll win the next time. 6. C_____ are only used when people eat Chinese food. 7. At the s _____ of a meal, if you're the guest, you'll be invited to serve yourself. 8. There was no e _____ for that accident. 9. Please be careful when you c_____ the street. 10. G_____,  fewer dishes are prepared in western countries than in China. 11. You are e_____ to stay here for another hour if you like. 12. My p_____ is filled with some meat.