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For questions 1-8, read the text and choose the correct answer for each gap. Click on a gap and a choice of words will appear. Then choose the correct answer.
Dogs have assisted police officers for hundreds of years. A famous early case in which police dogs were used was that of ‘Jack the Ripper’ in London. The so-called Ripper had got away several murders, and the public were demanding . Commissioner Charles Warren, head of the police , employed dogs in an attempt to reassure the people of London. However, one of the dogs bit the commissioner and then two ran away; the experiment ended with a police search for the animals, and for Warren.
Since then, canine training has improved considerably. Dogs must first pass an obedience course that proves they can follow . They are then trained as ‘single purpose’ or ‘dual purpose’ police dogs; the former is used for personal and finding criminals, while the also detects drugs or bombs. After training, a police dog will work for six to nine years on average, being retired only in the case of , sickness or pregnancy. And these days, any dog killed in the line of duty will be honoured in the same way as a human officer.