1.

1. ascribe to
2. key to
3. inclined to
4. crucial for

2.

1. in sight of
2. in shades of
3. in terms of
4. in guidance of

3.

1. not just
2. no only
3. no just
4. not almost

4.

1. Unless
2. Although
3. Once
4. Since

5.

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

(Reference keys.)