Bonjour,
WHO - WHOSE - WHEN - WHERE - WHICH ...
Réponse :
a) A murder is a case which involves a person killing another.
b) The crime scene is the place where ...
c) I'm looking forward to the day when the detectives finds the culprit.
d) A murderer is a person who killed someone.
e) Mr. Smith has a friend whose job is solving murders. ( ..dont le travail ..)