他的生日在六月，也就是一年中的第六个月。

His birthday is in June, the ___sixth month of the year.

她把蛋糕切成六份，我拿了其中一份。

She divided the cake into six parts, and I took one ___sixth.

这首曲子中，小提琴部分经常使用六度音程。

In this piece, the violin part frequently uses ___sixth intervals.