B)I was a doctor at the hospital.
They were my best friends.
The dog was black and white.
You was late for the lesson
The girls were tall and slim.
C)Was
Were
Was
Were
Was
It wasn't my birthday yesterday.
They weren't 10 years old in 1999.
That book wasn't very good.
Dana and Jane weren't at school today.
The cat wasn't in the house an hour ago.
IV)Sister
Grandmother
Uncle
Grandfather
Father
Aunt
Cousin
Niece
Nephew
Granddaughter