许多爵士三重奏由钢琴、吉他和低音提琴组成。

Many jazz ___trios consist of a piano, guitar and double bass.

我们由三位200米赛跑运动员组成的小组未能进入决赛。

Our ___trio of 200 meter runners failed to reach the final.

晚会以一支由女歌手组成的三重唱表演的歌曲结束。

The evening ended with a song performed by a ___trio of female singers.