她在五十多岁时创办了自己的公司。

She started her own business while she was ___in ___her ___fifties.

尽管他已经五十多岁了，但他经常跑马拉松。

Even though he is ___in ___his ___fifties, he runs marathons regularly.

许多五十多岁的人考虑提前退休。

Many people ___in ___their ___fifties consider early retirement.