作为一名歌手，每天练习以保持音准是至关重要的。

As a singer, it's crucial to practice daily to stay ___in ___tune.

合唱团听起来很美，因为每个人的音准都非常准。

The choir sounded beautiful because everyone was perfectly ___in ___tune.

音乐会开始前，管弦乐队花了很长时间给乐器调音。

Before the concert, the orchestra spent a long time getting their instruments ___in ___tune.