Fill in the correct preposition

1. Some women spend a lot of money [ ] cosmetics.

2. Since I moved house, I have kept [ ] touch with my old friends by email.

3. She is very sensitive [ ] other people's feelings.

4. Please hand in your assignment by Friday [ ] the latest.

5. Students' papers were piled one [ ] top of the other in the professor's study.

6. [ ] some respects the new version of the song is better than the original one.

7. She left her briefcase [ ] the top of the stairs this morning.

8. All her complaints were [ ] vain as nobody seemed to bother.

9. He is very proud [ ] his promotion to senior editor.

10. [ ] the one hand, her job is exciting but it can be stressful too.