4.
2. must, mustn't
3. doesn't have to
4. mustn't
5. don't have to
6. don't have to
7. don't have to
8. don't have to
9. mustn't
10. mustn't
5.
2. You should look for another job.
3. She should go away for a few day.
4. She shouldn't use her car so much.
5. He should put some pictures on the walls.
6. You shouldn't drive so fast.
7. He shouldn't go to bed so late.
8. You should take a photo.
