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1. Her prolonged absence made him realise how much he cared for her.
2. Kathy positioned herself by the door so as to be able to leave the room quickly.
3. This essay is marginally better than the last.
4. If your role in the incident ever comes to light, you'll go to prison.
5. Bob was instrumental in the drafting of the proposal.
6. My boss says his car is at my disposal so long as I'm careful.
7. Without her interference , everything would have gone smoothly.
8. She got the wrong end of the stick and so made a terrible mistake. 
9. I did everything with my power to prevent this problem from arising.
10. The matter in hand has no bearing on Karens's bad mood.

ANSWER:

1. Her prolonged absence made him realise how much he cared for her.
2. Kathy positioned herself by the door so as to be able to leave the room quickly.
3. This essay is marginally better than the last.
4. If your role in the incident ever comes to light, you'll go to prison.
5. Bob was instrumental in the drafting of the proposal.
6. My boss says his car is at my disposal so long as I'm careful.
7. Without her interference , everything would have gone smoothly.
8. She got the wrong end of the stick and so made a terrible mistake. 
9. I did everything with my power to prevent this problem from arising.
10. The matter in hand has no bearing on Karens's bad mood.