老师总是原谅学生的小错误，希望他们能从中学习。

The teacher kept ___excusing the students' minor mistakes, hoping they would learn from them.

她总是为自己的迟到找借口，说是因为公交车晚点。

She keeps ___excusing her tardiness by saying the bus was late.

老板批准他请假，免除了他今天的工作任务。

The boss ___excused him from today's work tasks due to his leave request.