他的儿子赢得了地区青少年网球锦标赛。

His son won the regional ___junior tennis tournament.

她通过执教一支青少年足球队获得了经验。

She gained experience as a coach for a ___junior football team.

这项青少年锦标赛对18岁以下的选手开放。

The ___junior championship is open to players under 18.