1. A. 5 minutes. B. 10 minutes. C. 15 minutes. D. 20 minutes.
2. A. In the kitchen. B. At the airport. C. In the school. D. In the bed.
3. A. The museum schedule. B. Library hours.
C. A part-time job. D. School hours.
4. A. Doctor and patient. B. Boss and employee.
C. Assistant and customer. D. Teacher and student.
