Ответ:

  1. They lived in a very big house in Edinburgh, far from the city centre.
  2. They were celebrating their twentieth wedding anniversary.
  3. Mr. Atkinson was a professor at St Andrews University.
  4. A terrible scream was heard from upstairs.
  5. She shouted because she saw Amelia lying on the floor with a knife in her back.
  6. He questioned all the people in the house to get clues about what had happened.
  7. Professor Brandon declared that he had gone to the garden for a few minutes to smoke a cigar.
  8. Mr. Perkins declared that he had never left the living room.
  9. The cook’s name was Alfred.
  10. She said that she had served the guests from the beginning until the police arrived.