who, which, that.. Rrigtigt indsat?

Er det relative pronominer korekt indsat (who, whom, whose, which that) ?

The head of the department, who was found dead in his fumefilled car last week, had a memo about the difficulties of his department.

The virus attacks those cells in the body which job it is to fight off infection.

How would it look if I suddently disappeared for weeks and left a gap which other people would have to fill.

Each small boy was accompanied to church by an older boy whose job it was to find the hymns and generally ensure good behaviour.

In the village, there are plenty of cafes and bars in whom to spend a pleasant evening.

Jack felt let down by the only person in whom he could confide.

Here are some suggestions that you can follow.

Focus will be on machines which are simple to operate and cheap to produce in large quantities.

I wish we hadn't done the things That went wrong.