她手忙脚乱地试图系鞋带。

She ___fumbled with the shoelaces trying to tie them.

他在接球时手滑了，球掉在了地上。

He ___fumbled the catch and the ball fell to the ground.

他紧张地结结巴巴，试图解释迟到原因。

He nervously ___fumbled through his explanation for being late.