每个人都认真倾听，并积极贡献自己的想法。

Everyone is listening attentively and ___contributing their ideas.

许多公司正在为灾区救援工作捐款捐物。

Many companies are ___contributing money and supplies to the disaster relief efforts.

缺乏睡眠是导致他疲劳的关键因素。

Lack of sleep is a key factor ___contributing to his fatigue.

她经常为这家报纸撰稿。

She enjoys ___contributing stories to this newspaper.