婚姻是一种古老的习俗制度。

Marriage is an ancient ___institution.

在许多家庭中，周日午餐是一种备受珍视的传统。

Sunday lunch is a cherished ___institution in many families.

喝下午茶的仪式是一项典型的英国传统。

The ritual of afternoon tea is a quintessential British ___institution.