custom|customs

在我国，结婚穿白色是一种习俗。

In my country, it's the ___custom to get married in white.

许多古老的习俗至今仍被遵循。

Many ancient ___customs are still observed today.

新娘穿白色婚纱是一种习俗。

It is a ___custom for the bride to wear a white wedding dress.