警官确认他的记录是清白的。

The police officer confirmed that his record was ___clean.

政治家必须保持清白的形象以获得公众信任。

Politicians must maintain a ___clean image to gain public trust.

经过彻底调查，该公司被宣布没有违法行为。

After a thorough investigation, the company was declared ___clean.