贵族常在城堡的主楼里举行狩猎活动。

The nobles often held hunting parties in the castle's ___keep.

这只忠诚的狗是我们家的核心。

The loyal dog is the ___key of our family.

他是办公室的开心果，也是我们团队活力的关键人物。

He's the office joker and the ___key of our team's energy.