许多顶尖选手参加国际网球巡回赛。

Many top players travel the international tennis ___circuit.

他的职业生涯始于当地的音乐巡回演出。

He started his career on the local music ___circuit.

这个节日巡回吸引了来自世界各地的艺术家。

The festival ___circuit attracts artists from around the world.