1.

1. in disguise of
2. in shades of
3. in search of
4. in place of

2.

1. paid
2. pays
3. pay
4. paying

3.

1. as opposed to
2. in addition to
3. as a result of
4. in spite of

4.

1. in fact
2. in effect
3. in particular
4. in vain

(Reference keys.)