他的干劲和坚持是他晋升的关键因素。

His ___drive and persistence were key factors in his promotion.

项目的成功取决于她克服障碍的坚定决心。

The project's success depended on her unwavering ___drive to overcome obstacles.

没有强烈的干劲，实现长期目标可能会很困难。

Without a strong ___drive, achieving long-term goals can be challenging.