1 . Years of workout on a regular basis makes him look athletic and ________________(energy). (所给词的适当形式填空)

2 . My grandfather is as ________(energy) as a young man and hates sitting around doing nothing all day.

3 . I think schools should encourage students to do more exercise after class. In this way, they may be healthier and ________ (energy). （所给词的适当形式填空）

4 . For all his years, he was none the less active and __________ (energy).