1. Had the nurse prepared everything by the time he arrived?2. Had the nurse or the doctor prepared everything by the time he arrived? 3. The nurse had prepared everything by the time he arrived, hadn't she? 4. Who had prepared everything by the time he arrived? 5. By what time had the nurse prepared everything?
3. The nurse had prepared everything by the time he arrived, hadn't she?
4. Who had prepared everything by the time he arrived?
5. By what time had the nurse prepared everything?