Fill the empty spaces with the missing words.
[start, aches, days off, heavy, feeling, muscle, shart, at FedEx]
Doctor: How are you today, Titus?
Patient: Not well. My back whenever I move.
Doctor: Please, tell me what happened.
Patient: Well, at work, I lift a lot of boxes. We deliver them to various businesses.
Doctor: Where do you work, Titus?
Patient: I work .
Doctor: So when did the pain ?
Patient: Well, I lifted one box and I didn't bend my knees. I felt a pain go through my body.
Doctor: You may have pulled a in your back. Take some painkillers and take at least three of work.
Patient: Thank you, Doctor. I will.