他弯起手臂，展示他的肌肉。

He ___bent his arm to show off his muscles.

这幅画挂歪了，需要调整一下。

The painting is hanging ___crooked and needs to be adjusted.

那个商人因参与不正当交易而被捕。

The businessman was arrested for his ___crooked business deals.

他弯下腰捡起了掉在地上的钥匙。

He ___bent his back to pick up the keys that fell on the ground.