许多居民都在八十多岁。

Many of the residents are ___in ___their ___eighties.

当你八十多岁时，你可能有更多空闲时间。

When you are ___in ___your ___eighties, you may have more free time.

我祖父尽管八十多岁了，仍然很活跃。

My grandfather is still active even though he is ___in ___his ___eighties.