Ответ:

ex. 3

1. discomfort;

2. payment;

3. unpolluted;

4. disagreement;

5. disappear;

6. behaviour.

ex. 4 A

1. of;

2. into;

3. for;

4. on;

5. without;

6. from.

ex. 4 B

1. down;

2. up;

3. off;

4. in.