这三位艺术家组成了一个强大的创作组合，他们的合作被誉为完美的三重奏。

The three artists formed a powerful creative ___threesome, and their collaboration was hailed as a perfect trio.

他们讨论过尝试三人行，但最终决定保持现状。

They talked about trying ___threesomes but ultimately decided to keep things as they were.

高尔夫俱乐部每周三下午都会组织分组活动。

The golf club organizes ___groupings every Wednesday afternoon.