Answer:
One possible reason the narrator hears the sound of a heartbeat at this moment could be that he feels guilty for what he had done, so he might be hearing his own heartbeat and begin to panic, thinking that it's the old man's heartbeat he's hearing.
A prepositional phrase is a group of words that lacks either a verb or a subject, and that functions as a unified part of speech. It normally consists of a preposition and a noun or a preposition and a pronoun.
1. Can
2. make
3. over
4. here
5. Give
6. nights
7. check
8. stayed
9. Executive
10. floor
11. credit
12. number
13. address
14. reserved
A general statement or concept obtained by inference from specific cases.
