1 He has to work eight hours a day, not to mention writing articles for the newspaper .
2 I wish everyone present could speak confined to the question that is under discussion.
3 The law does not recognize the unregistered marriage.
4 The ticket for this weekend isn't available.
5 These are the principles on/upon which various of organizations are built.
6 Because of his outstanding achievements in saling this year, the boss assured to reward him a new house.