As a police officer you have one of the most important jobs in the world: to serve and protect the people. While you are fighting crime and handling emergencies you probably come across many English speakers. Some may commit crimes, while others may be victims of crime. In both cases, you need to ask and answer questions in English. Your job may also require you to speak to English witnesses. Time can be a key factor in solving a crime or saving a life. You cannot always wait for an interpreter. These pages will help you learn vocabulary and phrases that will be useful when you encounter English speakers. Do the exercises and take the quizzes to test your knowledge and understanding.