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