Ex 1
1) whose
2) who
3) which
4) who
5) who
6) that
7) whose
8) who
9) whose
10) that
ex 2
1)where
2) who
3) who
4) whose
5) which
6) where
7) whose
8) which
ex 3
1) whose
2) which/ that
3) that
4) where
5) which
6) who
7) that/ which
8) why
9) when
10) who
11) which/that
12) that