Easy
They've caught the driver ____ caused the traffic accident.
who
This is the house in ______ I was born.
which
[Not all of the men had guns.]
Several men in plainclothes, ________ _____ ______ were armed, forced him to go with them.
some of whom
My mother, ___________ incredibly explosive temperament was passed on to me, was nonetheless hell bent on denying this simple fact of genetics.
whose
The things _________ he wrote won him many enemies.
∅ / which
I like the scene ______ Dorothy meets Scarecrow.
where
The police in Seattle arrested 20, all ___ _____ are members of a dangerous street gang.
of whom
Ultimately, her career as a writer never took off. Between 2000 and 2005 she wrote three novels, _____ _____ ____ was published.
none of which
This is the man _____ I am in love with
who
This is the house _________ I grew up in.
∅/ which
This is the man ____ ____ I used to work.
with whom
The children, ____ ___ _____ parents paid hefty sums to fund the school trip abroad, were incredibly dissatisfied with the quality of their accommodation.
all of whose
Is that the lady ______ husband tried to rob the bank?
whose
He denounced injustice at the conference, ________ everybody applauded.
which
The telescope ______ _______ scientists can observe the forming nebulae cost over 200 million USD.
through which
[The majority of the victims are American.]
The victims,_____ ___ _____were Americans, are being identified by the US authorities.
most of whom
The paramedics rescued the driver, both of ______ legs were injured.
whose
The world is full of good singers, of _______ nobody has heard.
whom
Our house, _______ value tripled since we bought it, is being put on the market.
whose
[Context:The Prime Minister's only two sons were involved in a scandal.]
The Prime Minister, ________ _______ ________ sons were arrested in the corruption scandal, resigned yesterday.
both of whose