B.
1. On
2. Down
3. Of
4. Out
5. Along with
6. For
C.
1. I may
2. Don't need
3. Mustn't
4. Better
5. Ought to
6. Mustn't
D.
1. It's better to stop wasting your money....
2. You shouldn't be late...
3. We don't need to ask Linda....
4. Jack would rather go to the concert