他55岁时仍然是一个活跃的跑步者。

He was still an ___active runner at 55.

保持活跃并进行定期锻炼很重要。

It's important to stay ___active and get regular exercise.

Nico是一个非常活跃的人，我很喜欢和他一起外出。

Nico is a very ___active guy and I enjoyed going out with him very much.