1. He called the police on June 16 saying he would lead them to a gambling den he discovered.
2. It's the first gambling den of its kind uncovered by police in three years.
3. Undercover police officers in Hong Kong managed to break a gambling den that boasted Ironclad security.
4. 911查询·英语单词
4. The operator of a gambling den had barbecue forks planted around the premises to slow down policemen in case of a raid.