WE USE _____WHEN WE REFER TO AN OBJECT
WHICH / THAT
WE USE _____WHEN WE SHOW POSSESSION.
WHOSE
WE USE _____WHEN WE REFER TO TIME.
WHEN
WE USE _____WHEN WE REFER TO A PLACE.
WHERE
WE USE ________ WHEN REFER TO A PERSON.
WHO/THAT
WE MAY OMITE THE RELTIVE PRONOUN WHE IT REFERS TO THE _____
OBJECT