我年轻时是个相当不错的足球运动员。

I was a fairly good football player in ___my ___youth.

我年轻时参加过几种运动，但现在我不是任何俱乐部的成员。

I played several kinds of sports during ___my ___youth, but now I am not a member of any club.

他经常谈论他年轻时的冒险。

He often talks about his adventures in ___his ___youth.