比赛的最后阶段，竞争变得更加激烈。

The competition became ___fiercer in the final stage of the match.

海浪变得更加凶猛，小船在波涛中剧烈摇晃。

The waves grew ___fiercer, making the small boat rock violently.

随着比赛的进行，选手们变得更有斗志了。

As the game went on, the players became ___fiercer in their determination.