3. Fill In the gaps with: neat, obsession, psychology, investigation, fictional, crime, writer, character, solve. 1) Sherlock Holmes is a famous _______ detective. 2) The detective's _______ with details helped him solve the case. 3) For his job, he must wear a _______ and tidy suit. 4) The police began their _______ of the crime. 5) Understanding _______ criminal _______ is an important part of a detective's work. 6) Agatha Christie was a very talented _______ who wrote many books. 7) Hercule Poirot is a famous _______ in literature. 8) The main goal of any detective is to _______ the mystery. 9) Murder is a very serious _______