这个新耳机质量很差，才用两天就坏了。

The new headphones are ___defective and stopped working after two days.

他因篡改考试成绩被抓。

He was caught trying to ___falsify the exam results.

他坐在长凳上，揉了揉酸痛的屁股。

He sat on the bench and rubbed his sore ___butt.