1. Custom required our dressing for dinner. 礼俗要求我们参加宴会穿礼服。

2. It is an old custom that men tip their hats when greeting somebody.

3. It is the custom for the Chinese to take off their shoes when they get into a hall.

4. It is the custom to dye eggs at Easter.

5. Merry Christmas and a Happy New Year.

6. So many countries, so many customs. 有多少国家，就有多少习俗;百里不同风。

7. Social custom vary greatly from country to country.

8. The celebration of Christmas is a custom.

9. Turkey and ham are traditional dishes for Christmas.

10. When in Rome do as the Romans.