他在六十多岁时开始学习西班牙语。

He began learning Spanish ___in ___his ___sixties.

我姑姑六十多岁了，还经常旅行。

My aunt is ___in ___her ___60s and still travels frequently.

许多人在六十多岁时退休。

Many people retire ___in ___their ___sixties.