1. The informant decided to tip off the police about the drug deal happening in the neighborhood. (通知警方)

2. I heard that someone tipped off the press about the scandal involving the mayor. (向媒体泄露)

3. The anonymous tip off led to the arrest of the suspect in the murder case. (匿名举报)

4. It is important to be cautious when receiving a tip off from an unknown source. (警惕来自不明来源的举报)

5. The whistleblower decided to tip off the authorities about the company's illegal activities. (向政府举报)

6. The coach received a tip off about the opposing team's strategy before the game. (得知线报)