在那时，也就是20世纪早期，探戈被认为是一种不道德的音乐类型。

At this time, the early 20's, tango was considered an ___immoral type of music.

这家公司被指控有不道德的行为。

The company was accused of ___immoral behaviour.

许多人曾认为探戈是不道德的，但卡洛斯·加德尔改变了这种看法。

Many people believed tango was ___immoral, but Carlos Gardel changed this belief.