秘书正在把文件归入正确的文件夹。

The secretary is ___slotting the documents into the correct folders.

医生正在为病人预约下周的检查时间。

The doctor is ___scheduling patients for check-ups next week.

老师正在根据学生的能力将他们分配到不同的小组。

The teacher is ___assigning students into different groups based on their abilities.