翻译成英语：“在KTV里，我们习惯把音乐开的很小，不用麦克风唱歌”

In the KTV, we were used to turning down the music and singing without the microphone
考察的是be used to doing sth这个词组。习惯于做某事情

We are used to turning down the music and singing without microphone
In the KTV.

In KTV, we're used to turn the music to a low tone, singing without microphones.

In the KTV, we used a very small opening of music, singing without microphones.