教育是通往更好生活的护照。

Education is ___a ___passport ___to a better life.

大学学位可以是更高收入的敲门砖。

A university degree can be ___a ___passport ___to higher earnings.

在许多文化中，婚姻被视为获得社会接受的途径。

In many cultures, marriage is viewed as ___a ___passport ___to social acceptance.