I.
1) rien/who (les deux marchent)
2) who
3) who
4) which
5) where
6) which
7) rien
8) rien/when (les deux marchent)
9) which
10) rien
II.
1) either...or
2) as soon as
3) since
4) neither...nor
5) although
6) if
7) however
8) while
9) in order to
10) until
